texlive[59992] Master: spectralsequences (19jul21)

commits+karl at tug.org commits+karl at tug.org
Mon Jul 19 22:15:07 CEST 2021


Revision: 59992
          http://tug.org/svn/texlive?view=revision&revision=59992
Author:   karl
Date:     2021-07-19 22:15:07 +0200 (Mon, 19 Jul 2021)
Log Message:
-----------
spectralsequences (19jul21)

Modified Paths:
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    trunk/Master/texmf-dist/doc/latex/spectralsequences/README.md
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/ANSS-S_2.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/ANSS-S_3.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/ASS-S_2.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/ASS-S_3.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/ASS-tmf_2.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/HFPSS-EO2_3.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/HFPSS-KO.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/J_RPinfty.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/J_RPinfty.tex
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/MaySS-bo-A1.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/MaySS-tmf-A2.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/SSS-KF3n.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/SSS-KZ3.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/hatcher.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/hatcher.tex
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/unstable_ASS_SO.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/unstable_ASS_SO.tex
    trunk/Master/texmf-dist/doc/latex/spectralsequences/manual/spectralsequencesmanual.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/manual/spectralsequencesmanual.tex
    trunk/Master/texmf-dist/doc/latex/spectralsequences/manual/spectralsequencesmanualpreamble.tex
    trunk/Master/texmf-dist/tex/latex/spectralsequences/spectralsequences.sty
    trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqcheckdefinitions.code.tex
    trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqdrawing.code.tex
    trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqforeach.code.tex
    trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqkeys.code.tex
    trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqloadstore.code.tex
    trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqmacromakers.code.tex
    trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqmain.code.tex
    trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqmessages.code.tex
    trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqparsers.code.tex
    trunk/Master/tlpkg/libexec/ctan2tds

Removed Paths:
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    trunk/Master/texmf-dist/doc/latex/spectralsequences/manual/examples/
    trunk/Master/texmf-dist/doc/latex/spectralsequences/manual/spectralsequences-howitworks.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/manual/spectralsequencesmanual-draftmode.pdf
    trunk/Master/texmf-dist/doc/latex/spectralsequences/manual/sseqmanualtest.tex

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===================================================================
--- trunk/Master/texmf-dist/doc/latex/spectralsequences/README.md	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/doc/latex/spectralsequences/README.md	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,5 +1,5 @@
 
-spectralsequences v1.2.2
+spectralsequences v1.3.0
 ========================
 Author: Hood Chatham  
 Email: hood at mit.edu  
@@ -13,8 +13,31 @@
 
 Changelog:
 ==========
-## [1.2.2] (2018-02-18)
+## [1.3.0] (2021-07-18)
+### Added:
+- Added more control over page indicator in title and "print page as" key.
+- Added `page=\infty`.
+- Added `\extension` and `\extensionoptions`
+- Added `\replacestructlines`
+- Added `range check off`, `range check on`, and `range check sideways` global
+  keys to control range checks. The `sideways` environment from `rotating`
+  environment automatically uses `range check sideways` (issue #11). 
+
 ### Fixed:
+- Removed `\replaceclass` in `{sseqpage}` without `keep changes` error (suggested by Junhou Fung).
+- Fixed `\doptions` and `\structlineoptions` so that they can be used to add an edge label -- `needs tikz` wasn't handled correctly (reported by idlaviV)
+- Fixed title positioning when the `xrange` that doesn't start at 0 (reported by Robert Burklund)
+- Fixed relative tikz coordinates (reported by Dexter Chua).
+- Fixed foreach loops nested inside of plain tikz commands (e.g., `\draw (0,0) foreach \x in {1,2,3} {--(\x,\x)};`)
+- Fixed `this page structlines` (reported by Irina Bobkova)
+- Fixed `fit classes` to accomodate new version of `\tikz at calc@anchor` in tikz version 3.1.5
+- Fixed various other incompatiblities with latex3 with various versions of expl3.
+
+### Changed:
+- \replaceclass now pushes the class replaced onto the stack.
+
+## [1.2.2] (2019-02-18)
+### Fixed:
 - expl3 defined \exp_after:NNNf recently, so I changed \cs_new:Npn \exp_after:NNNf to \cs_set:Npn \exp_after:NNNf and copied the definition given by
   expl3.
 - expl3 changed the definition of \peek_meaning_ignore_spaces to be in terms of \peek_meaning so \letting \peek_meaning to \peek_meaning_ignore_spaces 

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===================================================================
--- trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/J_RPinfty.tex	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/J_RPinfty.tex	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2 2017-09-16 2017-09-16
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% File: example_endofVFoS.tex

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--- trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/hatcher.tex	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/hatcher.tex	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2 2017-09-16 2017-09-16
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% File: example_hatcher.tex

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--- trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/unstable_ASS_SO.tex	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/doc/latex/spectralsequences/examples/unstable_ASS_SO.tex	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2 2017-09-16 2017-09-16
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% File: example_unstable_ASS_SO.tex

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===================================================================
--- trunk/Master/texmf-dist/doc/latex/spectralsequences/manual/spectralsequencesmanual.tex	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/doc/latex/spectralsequences/manual/spectralsequencesmanual.tex	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2 2017-09-16 2017-09-16
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% File: spectralsequencesmanual.tex
@@ -21,7 +21,7 @@
 %  explain / cross reference examples folder?
 %  \sseqlastlabel is not currently documented.
 %
-\def\version{Version 1.2.2}
+\def\version{Version 1.3.0}
 
 
 \input spectralsequencesmanualpreamble
@@ -37,9 +37,31 @@
 
 \begin{abstract}
 \noindent
-The \sseqpages\  package is a specialized tool built on top of \pgfpkg/\tikzpkg\  for drawing spectral sequence charts. It provides a powerful, concise syntax for specifying the data of a spectral sequence, and then allows the user to print various pages of a spectral sequence, automatically choosing which subset of the classes, differentials, and structure lines to display on each page. It also handles most of the details of the layout. At the same time, \sseqpages\  is extremely flexible. It is closely integrated with \tikzpkg\  to ensure that users can take advantage of as much as possible of its expressive power. It is possible to turn off most of the automated layout features and draw replacements using \tikzpkg\  commands. \sseqpages\  also has a carefully designed error reporting system intended to ensure that it is as clear as possible what is going wrong.
+The \sseqpages\  package is a specialized tool built on top of \pgfpkg/\tikzpkg\
+for drawing spectral sequence charts. It provides a powerful, concise syntax for
+specifying the data of a spectral sequence, and then allows the user to print
+various pages of a spectral sequence, automatically choosing which subset of the
+classes, differentials, structure lines, and extensions to display on each page.
+It also handles most of the details of the layout. At the same time, \sseqpages\
+is extremely flexible. It is closely integrated with \tikzpkg\  to ensure that
+users can take advantage of as much as possible of its expressive power. It is
+possible to turn off most of the automated layout features and draw replacements
+using \tikzpkg\  commands. \sseqpages\  also has a carefully designed error
+reporting system intended to ensure that it is as clear as possible what is
+going wrong.
 
-Many thanks to the authors of \tikzpkg\  for producing such a wonderful package with such thorough documentation. I would have needed to spend a lot more time reading the \tikzpkg\  code if the documentation weren't so excellent. I took ideas or code or both from \tikzcdpkg\ (part of the code for turning quotes into class or edge labels), \pgfplotspkg\ (axes labels), and \sseqpkg\ (the grid types, the stack). I lifted a fair amount of code from \TeX stack exchange. Thanks to Eva Belmont for tons of helpful suggestions, bug reports, and productive conversations. Talking to her has helped to clarify many design concepts for the package. Thanks to Eric Peterson for being a very early adopter and reporting many bugs. Also thanks to all my friends, family, and acquaintances listened to me talk about \LaTeX\ programming even though they probably found it dreadfully boring.
+Many thanks to the authors of \tikzpkg\  for producing such a wonderful package
+with such thorough documentation. I would have needed to spend a lot more time
+reading the \tikzpkg\  code if the documentation weren't so excellent. I took
+ideas or code or both from \tikzcdpkg\ (part of the code for turning quotes into
+class or edge labels), \pgfplotspkg\ (axes labels), and \sseqpkg\ (the grid
+types, the stack). I lifted a fair amount of code from \TeX stack exchange.
+Thanks to Eva Belmont for tons of helpful suggestions, bug reports, and
+productive conversations. Talking to her has helped to clarify many design
+concepts for the package. Thanks to Eric Peterson for being a very early adopter
+and reporting many bugs. Also thanks to all my friends, family, and
+acquaintances listened to me talk about \LaTeX\ programming even though they
+probably found it dreadfully boring.
 \end{abstract}
 \end{titlepage}
 
@@ -50,7 +72,11 @@
 \tableofcontents
 \newpage
 \section{Introduction}
-The \sseqpages\  package consists of two main environments -- the \sseqdataenv\  environment, which specifies the data for a named spectral sequence, and the \sseqpageenv\  environment, which prints a single page of a spectral sequence. The |\printpage| command is also available as a synonym for a \sseqpageenv\  environment with an empty body.
+The \sseqpages\  package consists of two main environments -- the \sseqdataenv\
+environment, which specifies the data for a named spectral sequence, and the
+\sseqpageenv\  environment, which prints a single page of a spectral sequence.
+The |\printpage| command is also available as a synonym for a \sseqpageenv\
+environment with an empty body.
 
 Here is a basic example:
 \begin{codeexample}[width = 8.7cm]
@@ -65,21 +91,58 @@
 \printpage[ name = basic, page = 3 ]  \quad
 \printpage[ name = basic, page = 4 ]
 \end{codeexample}
-\codeverb|\begin{sseqdata}[name = basic, cohomological Serre grading]| starts the declaration of the data of a spectral sequence named |basic| with cohomological Serre grading -- that is, the page $\mathtt{r}$ differentials go $\mathtt{r}$ to the right and down $\mathtt{r-1}$. Then we specify four classes and one page 3 differential, and we ask \sseqpages\  to print the third and fourth pages of the spectral sequence. Note that on the fourth page, the source and target of the differential have disappeared.
+\codeverb|\begin{sseqdata}[name = basic, cohomological Serre grading]| starts
+the declaration of the data of a spectral sequence named |basic| with
+cohomological Serre grading -- that is, the page $\mathtt{r}$ differentials go
+$\mathtt{r}$ to the right and down $\mathtt{r-1}$. Then we specify four classes
+and one page 3 differential, and we ask \sseqpages\  to print the third and
+fourth pages of the spectral sequence. Note that on the fourth page, the source
+and target of the differential have disappeared.
 
 \subsection{Installation}
-In both \miktex\ and \texlive\ installation should be automatic -- your \TeX\ distribution should automatically install the package the first time you include |\usepackage{spectralsequences}| in a document and compile it. However, in 2016, \texlive\ made an incompatible change to their database, so no new packages will run on versions of \texlive\ from before 2016. This includes \sseqpages. If you have an old version of \texlive, you can either perform a manual install,
-or, better, you should install an up to date version of \texlive. If you want to do a manual install, see \href{https://tex.stackexchange.com/a/73017}{this \TeX stack exchange post} for instructions.
+In both \miktex\ and \texlive\ installation should be automatic -- your \TeX\
+distribution should automatically install the package the first time you include
+|\usepackage{spectralsequences}| in a document and compile it. However, in 2016,
+\texlive\ made an incompatible change to their database, so no new packages will
+run on versions of \texlive\ from before 2016. This includes \sseqpages. If you
+have an old version of \texlive, you can either perform a manual install, or,
+better, you should install an up to date version of \texlive. If you want to do
+a manual install, see \href{https://tex.stackexchange.com/a/73017}{this \TeX
+stack exchange post} for instructions.
 
 \subsection{Memory Constraints}
-In a default \TeX\ install, \pdfLaTeX\ has small static memory caps that prevent it from using more than about 60 megabytes of total ram. However, \spectralsequences\ and \pgfpkg/\tikzpkg\ use a large amount of memory. For this reason, using \pdfLaTeX\ with a default install, you cannot draw more than about 2500 classes across all of your diagrams (fewer if you include differentials, structure lines, and other features). There are a few solutions to this.
+In a default \TeX\ install, \pdfLaTeX\ has small static memory caps that prevent
+it from using more than about 60 megabytes of total ram. However,
+\spectralsequences\ and \pgfpkg/\tikzpkg\ use a large amount of memory. For this
+reason, using \pdfLaTeX\ with a default install, you cannot draw more than about
+2500 classes across all of your diagrams (fewer if you include differentials,
+structure lines, and other features). There are a few solutions to this.
 
-The easiest solution is to run \LuaLaTeX. \LuaLaTeX\ dynamically allocates memory and so is unlikely to run out of it. Using \LuaLaTeX\ on my computer, I can compile a document that draws two copies of a diagram with 20,000 classes in it (so a total of 40,000 classes). This takes about 50 seconds and 250 megabytes of ram. I expect any real-world use case will compile fine on a modern computer using \LuaLaTeX. This option has the advantage that any modern \TeX\ install comes with a copy of \LuaLaTeX, and that \LuaLaTeX\ is the designated successor to \pdfLaTeX. It has the disadvantage that there are some incompatibilities between \LuaLaTeX\ and \pdfLaTeX\ so if your document depends on \pdfLaTeX-specific features, it might be a pain to switch to \LuaLaTeX.
+The easiest solution is to run \LuaLaTeX. \LuaLaTeX\ dynamically allocates
+memory and so is unlikely to run out of it. Using \LuaLaTeX\ on my computer, I
+can compile a document that draws two copies of a diagram with 20,000 classes in
+it (so a total of 40,000 classes). This takes about 50 seconds and 250 megabytes
+of ram. I expect any real-world use case will compile fine on a modern computer
+using \LuaLaTeX. This option has the advantage that any modern \TeX\ install
+comes with a copy of \LuaLaTeX, and that \LuaLaTeX\ is the designated successor
+to \pdfLaTeX. It has the disadvantage that there are some incompatibilities
+between \LuaLaTeX\ and \pdfLaTeX\ so if your document depends on
+\pdfLaTeX-specific features, it might be a pain to switch to \LuaLaTeX.
 
-Another option is to increase the static memory caps for \pdfLaTeX. See \href{https://tex.stackexchange.com/a/26213}{this \TeX stack exchange post} for instructions on how to do this.
+Another option is to increase the static memory caps for \pdfLaTeX. See
+\href{https://tex.stackexchange.com/a/26213}{this \TeX stack exchange post} for
+instructions on how to do this.
 
-\subsection{A warning about fragile macros}
-All the data in a \sseqpages\  environment is stored and used later. As a result, most of the \sseqpages\  commands currently cannot tolerate fragile macros. Unfortunately, it is impossible for \sseqpages\  to warn you about this situation -- if you use a fragile command in a place that it doesn't belong, the result will be an incomprehensible error message. If you are getting nonsense error messages, this might be why. The solution is to convert fragile macros into robust ones. Common examples of fragile macros include |\widehat| and |\underline|. My suggested solution to this is to add the following code to your preamble for each fragile macro (example given for |\mathbb|):
+\subsection{A warning about fragile macros}%
+All the data in a \sseqpages\  environment is stored and used later. As a
+result, most of the \sseqpages\  commands currently cannot tolerate fragile
+macros. Unfortunately, it is impossible for \sseqpages\  to warn you about this
+situation -- if you use a fragile command in a place that it doesn't belong, the
+result will be an incomprehensible error message. If you are getting nonsense
+error messages, this might be why. The solution is to convert fragile macros
+into robust ones. Common examples of fragile macros include |\widehat| and
+|\underline|. My suggested solution to this is to add the following code to your
+preamble for each fragile macro (example given for |\mathbb|):
 \begin{codeexample}[code only]
 \let\oldwidehat\widehat
 \protected\def\widehat{\oldwidehat}
@@ -87,26 +150,45 @@
 
 
 \section{Package Options and Environments}
-\begin{manualentry}{Draft Mode}
-The drawings that \sseqpages\ produces can be quite slow, especially if they are large. Draft mode skips drawing the content of the spectral sequence, but still takes up exactly the same amount of space in the document, so that you can deal with formatting issues. To active draft mode, load the package by saying |\usepackage[draft]{spectralsequences}|.
+\begin{manualentry}{Draft Mode}%
+The drawings that \sseqpages\ produces can be quite slow, especially if they are
+large. Draft mode skips drawing the content of the spectral sequence, but still
+takes up exactly the same amount of space in the document, so that you can deal
+with formatting issues. To active draft mode, load the package by saying
+|\usepackage[draft]{spectralsequences}|.
 \end{manualentry}
 
-\begin{environment}{{sseqdata}\moptions}
-The \sseqdataenv\  environment is for storing a spectral sequence to be printed later. This environment is intended for circumstances where you want to print multiple pages of the same spectral sequence. When using the \sseqdataenv\  environment, you must use the |name| option to tell \sseqpages\  where to store the spectral sequence so that you can access it later.
+\begin{environment}{{sseqdata}\moptions}%
+The \sseqdataenv\  environment is for storing a spectral sequence to be printed
+later. This environment is intended for circumstances where you want to print
+multiple pages of the same spectral sequence. When using the \sseqdataenv\
+environment, you must use the |name| option to tell \sseqpages\  where to store
+the spectral sequence so that you can access it later.
 \end{environment}
 
-\begin{environment}{{sseqpage}\ooptions}
-This environment is used for printing a page of existing spectral sequence that was already specified using the \sseqdataenv\  environment. The body of the environment adds local changes -- classes, differentials, structure lines, and arbitrary \tikzpkg\  options that are by default only printed on this particular page. The \sseqpageenv\  environment can also be used to print a stand-alone page of a spectral sequence -- that is, if you only want to print a single page of the spectral sequence, you can skip using the \sseqdataenv\  environment.
+\begin{environment}{{sseqpage}\ooptions}%
+This environment is used for printing a page of existing spectral sequence that
+was already specified using the \sseqdataenv\  environment. The body of the
+environment adds local changes -- classes, differentials, structure lines,
+extensions, and arbitrary \tikzpkg\  options that are by default only printed on
+this particular page. The \sseqpageenv\  environment can also be used to print a
+stand-alone page of a spectral sequence -- that is, if you only want to print a
+single page of the spectral sequence, you can skip using the \sseqdataenv\
+environment.
 \end{environment}
 
-\begin{command}{\printpage\moptions}
-This command prints a single page of an existing spectral sequence as-is. This is equivalent to a \sseqpageenv\  environment with an empty body.
+\begin{command}{\printpage\moptions}%
+This command prints a single page of an existing spectral sequence as-is. This
+is equivalent to a \sseqpageenv\  environment with an empty body.
 \end{command}
 
 
 \section{The Main Commands}
-\begin{command}{\class\ooptions\parargtwo{x}{y}}
-This places a class at |(x,y)| where |x| and |y| are integers. If multiple classes occur at the same position, \sseqpages\  will automatically arrange them in a pre-specified pattern. This pattern may be altered using the |class pattern| option.
+\begin{command}{\class\ooptions\parargtwo{x}{y}}%
+This places a class at |(x,y)| where |x| and |y| are integers. If multiple
+classes occur at the same position, \sseqpages\  will automatically arrange them
+in a pre-specified pattern. This pattern may be altered using the%
+|class pattern| option.
 \begin{codeexample}[]
 \begin{sseqpage}[ no axes, ymirror, yscale = 0.8 ]
 \class(0,0)
@@ -118,9 +200,13 @@
 \end{sseqpage}
 \end{codeexample}
 
-The effect of the |\class| command is to print a \tikzpkg\ node on a range of pages. Any option that would work for a \tikzpkg\ |\node| command will also work in the same way for the |\class|, |\replaceclass|, and |\classoptions| commands.
+The effect of the |\class| command is to print a \tikzpkg\ node on a range of
+pages. Any option that would work for a \tikzpkg\ |\node| command will also work
+in the same way for the |\class|, |\replaceclass|, and |\classoptions| commands.
 
-If a class is the source or the target of a differential on a certain page, then the page of the class is set to that page, and the class is only rendered on pages up to that number:
+If a class is the source or the target of a differential on a certain page, then
+the page of the class is set to that page, and the class is only rendered on
+pages up to that number:
 \begin{codeexample}[width = 8cm]
 \begin{sseqdata}[ name = class example,
                   Adams grading,
@@ -135,11 +221,21 @@
 \printpage[ name = class example, page = 3 ]
 \end{codeexample}
 
-See the \pgfmanualpdfref{class options}{class options} section for a list of the sort of options available for classes.
+See the \pgfmanualpdfref{class options}{class options} section for a list of the
+sort of options available for classes.
 \end{command}
 
-\begin{commandlist}{{\replaceclass\ooptions\parargthreeopt{x}{y}{n}},\replaceclass\ooptions\pararg{classname}, \replacesource\ooptions, \replacetarget\ooptions}
-After a class is the source or target of a differential, it disappears on the next page. However, some differentials are not injective or not surjective. Using the command |\replaceclass| causes a new symbol to appear on the page after a class supported or accepted a differential (or both). If there are multiple classes at the coordinate |(x,y)| you may specify which using an integer or a |tag| $n$. By default, this command will affect the first class placed in that position. You can also provide the |class:name| of a class. The variants |\replacesource| and |\replacetarget| replace the source and target respectively of the most recent differential.
+\begin{commandlist}{{\replaceclass\ooptions\parargthreeopt{x}{y}{n}},\replaceclass\ooptions\pararg{classname},
+\replacesource\ooptions, \replacetarget\ooptions}%
+After a class is the source or target of a differential, it disappears on the
+next page. However, some differentials are not injective or not surjective.
+Using the command |\replaceclass| causes a new symbol to appear on the page
+after a class supported or accepted a differential (or both). If there are
+multiple classes at the coordinate |(x,y)| you may specify which using an
+integer or a |tag| $n$. By default, this command will affect the first class
+placed in that position. You can also provide the |class:name| of a class. The
+variants |\replacesource| and |\replacetarget| replace the source and target
+respectively of the most recent differential.
 \begin{codeexample}[]
 \begin{sseqdata}[name = replace class example, Adams grading, classes = {draw = none } ]
 \class["\mathbb{Z}"](0,3)
@@ -154,13 +250,38 @@
 \printpage[ name = replace class example, page = 3 ] \qquad
 \printpage[ name = replace class example, page = 4 ]
 \end{codeexample}
-Note that this will not restore any structure lines coming into or off of the class, if you want the structure lines to persist, you must call |\structline| again (or use the |structline:page| option).
+Note that this will not restore any structure lines coming into or off of the
+class. If you want to restore all structlines on the class use
+|\replacestructlines|. If you want to selectively replace some of the structure
+lines, you must use |\structline| again (or use the |structline:page| option).
 \end{commandlist}
 
-\begin{commandlist}{{\classoptions\moptions\parargthreeopt{x}{y}{n}},\classoptions\moptions\pararg{classname}, \classoptions\moptions}
-This adds options to an existing class. This can be used in a \sseqpageenv\  environment to modify the appearance of a class for just one drawing of the spectral sequence, for instance to highlight it for discussion purposes.
+\begin{command}{\replacestructlines\opt{\pars{\sourcecoord}}}%
+This command replaces all structlines touching a class that has been
+replaced using |\replaceclass|, |\replacesource|, or |\replacetarget|.
+\begin{codeexample}[]
+\begin{sseqdata}[name=replacestructlines]
+\class(0,1)
+\class(0,2)
+\structline
+\class(1,0)
+\d2(1,0)(0,2)
+\replacetarget\replacestructlines
+\end{sseqdata}
+\printpage[name=replacestructlines, page=3]
+\end{codeexample}
+\end{command}
 
-If there are multiple classes at the coordinate |(x,y)| you may specify which using an integer or a |tag| $n$. By default, this command will affect the first class placed in that position. You can also provide the |class:name| of a class. If no coordinate is indicated at all, then |\lastclass| is used.
+\begin{commandlist}{{\classoptions\moptions\parargthreeopt{x}{y}{n}},\classoptions\moptions\pararg{classname},
+\classoptions\moptions}%
+This adds options to an existing class. This can be used in a \sseqpageenv\
+environment to modify the appearance of a class for just one drawing of the
+spectral sequence, for instance to highlight it for discussion purposes.
+
+If there are multiple classes at the coordinate |(x,y)| you may specify which
+using an integer or a |tag| $n$. By default, this command will affect the first
+class placed in that position. You can also provide the |class:name| of a class.
+If no coordinate is indicated at all, then |\lastclass| is used.
 \begin{codeexample}[width = 6cm]
 \begin{sseqdata}[ name = class options example,
                   classes = fill ]
@@ -176,7 +297,8 @@
     {\textup{The red class is the problem}};
 \end{sseqpage}
 \end{codeexample}
-Another reason to use this is to give a label to one instance of a class that shows up in a loop or a command defined using |\NewSseqGroup|:
+Another reason to use this is to give a label to one instance of a class that
+shows up in a loop or a command defined using |\NewSseqGroup|:
 \begin{codeexample}[width = 6cm]
 \NewSseqGroup\mygroup {} {
     \class(0,0)
@@ -196,7 +318,8 @@
 \classoptions["\eta"](1,1)
 \end{sseqpage}
 \end{codeexample}
-See the \pgfmanualpdfref{class options}{class options} section for a list of the sort of options available for classes.
+See the \pgfmanualpdfref{class options}{class options} section for a list of the
+sort of options available for classes.
 \end{commandlist}
 
 \begin{commandlist}{
@@ -204,10 +327,27 @@
     {\d\ooptions\meta{page}\pars{\meta{x},\meta{y}\opt{,\sourcen,\targetn}}},
     {\d\ooptions\meta{page}\pars{\sourcename\opt{,\targetn}}},
     {\d\ooptions\meta{page}\pars{\sourcecoord}\pars{\targetcoord}}%
-}
-Calling |\d\meta{page}|\parargtwo{x}{y} creates a differential starting at \parargtwo{x}{y} of length determined by the specified page. In order to use the |\d| command like this, you must first specify the |degree| of the differentials as an option to the \sseqdataenv\  or \sseqpageenv\  environment. The degree indicates how far to the right and how far up a page $\mathtt{r}$ differential will go as a function of $\mathtt{r}$. If there is a page $\mathtt{r}$ differential, on page $\mathtt{r+1}$, the source, target, and any structure lines connected to the source and target of the differential disappear. If no class is specified, the default is to use |\lastclass|.
+}%
+Calling |\d\meta{page}|\parargtwo{x}{y} creates a differential starting at
+\parargtwo{x}{y} of length determined by the specified page. In order to use the
+|\d| command like this, you must first specify the |degree| of the differentials
+as an option to the \sseqdataenv\  or \sseqpageenv\  environment. The degree
+indicates how far to the right and how far up a page $\mathtt{r}$ differential
+will go as a function of $\mathtt{r}$. If there is a page $\mathtt{r}$
+differential, on page $\mathtt{r+1}$, the source, target, and any structure
+lines connected to the source and target of the differential disappear. If no
+class is specified, the default is to use |\lastclass|.
 
-If there are multiple nodes in the source or target, you may specify which one the differential should go to using an index or tag for \sourcen\  or \targetn. It is also possible to provide the name of the source coordinate and an optional target, or to separately provide the source and target coordinate, either as names or as \parargthree{x}{y}{n}. Using |\d| with explicit source and target coordinates works even if you did not provide a |degree| to the spectral sequence. If you did provide a |degree|, then \sseqpages\  will check whether the difference between the source and target is appropriate for a differential of a given page, and if not it will throw an error. If this is undesirable, you can use the |lax degree| option.
+If there are multiple nodes in the source or target, you may specify which one
+the differential should go to using an index or tag for \sourcen\  or \targetn.
+It is also possible to provide the name of the source coordinate and an optional
+target, or to separately provide the source and target coordinate, either as
+names or as \parargthree{x}{y}{n}. Using |\d| with explicit source and target
+coordinates works even if you did not provide a |degree| to the spectral
+sequence. If you did provide a |degree|, then \sseqpages\  will check whether
+the difference between the source and target is appropriate for a differential
+of a given page, and if not it will throw an error. If this is undesirable, you
+can use the |lax degree| option.
 \begin{codeexample}[width = 7.5cm]
 \begin{sseqdata}[ name = d example, degree = {-1}{#1},
                   struct lines = blue, yscale = 1.3 ]
@@ -223,8 +363,11 @@
 \printpage[ name = d example, page = 2 ] \quad
 \printpage[ name = d example, page = 3 ]
 \end{codeexample}
-If there are multiple nodes in the source or target coordinate, then there is a funny syntax for indicating which one should be the source and target:
+If there are multiple nodes in the source or target coordinate, then there is a
+funny syntax for indicating which one should be the source and target:
+\begin{center}
 |\d\meta{page}\pars{\meta{x},\meta{y}\opt{,\sourcen,\targetn}}|
+\end{center}
 \begin{codeexample}[width = 7.5cm]
 \begin{sseqpage}[ Adams grading, yscale = 0.8 ]
 \class(1,0) \class(1,0)
@@ -238,7 +381,9 @@
 \d2(3,0,,2)
 \end{sseqpage}
 \end{codeexample}
-Negative indices will count from the most recent class in the coordinate (so the most recent is |-1|, the second most recent is |-2|, etc). You can also use a |tag|, which works better if the situation is complicated.
+Negative indices will count from the most recent class in the coordinate (so the
+most recent is |-1|, the second most recent is |-2|, etc). You can also use a
+|tag|, which works better if the situation is complicated.
 \begin{codeexample}[width = 7.5cm]
 \begin{sseqpage}[ Adams grading, yscale = 0.65 ]
 \class(1,0)
@@ -257,20 +402,43 @@
     {\doptions\moptions\meta{page}\pars{\meta{x},\meta{y}\opt{,\sourcen,\targetn}}},
     {\doptions\moptions\meta{page}\pars{\sourcename\opt{,\targetn}}},
     {\doptions\moptions\meta{page}\pars{\sourcecoord}\pars{\targetcoord}}%
-}
-This command adds options to an existing differential, just like |\classoptions| except for differentials. Its syntax is identical to that of |\d|.
+}%
+This command adds options to an existing differential, just like |\classoptions|
+except for differentials. Its syntax is identical to that of |\d|.
 \end{commandlist}
 
-\begin{command}{\kill\meta{page}\oarg{coord}}
-This command sets the indicated coordinate to die on the indicated page, but does not establish a target for the differential. This is useful if you want to draw your own differential using tikz (see |\getdtarget|) or if you are not drawing the class on the other side of the differential for clutter reasons. As usual, if no coordinate is provided, the default argument is |\lastclass|.
+\begin{command}{\kill\meta{page}\oarg{coord}} This command sets the indicated
+coordinate to die on the indicated page, but does not establish a target for the
+differential. This is useful if you want to draw your own differential using
+tikz (see |\getdtarget|) or if you are not drawing the class on the other side
+of the differential for clutter reasons. As usual, if no coordinate is provided,
+the default argument is |\lastclass|.
 \end{command}
 
 \begin{command}{\structline\ooptions\opt{\pars{\sourcecoord}\pars{\targetcoord}}}
-This command creates a structure line from \sourcecoord\  to \targetcoord. The source and target coordinates are either of the form \pars{\meta{x},\meta{y}\opt{,\meta{n}}} or \pararg{class name}. If there are multiple classes at $\mathtt{(x,y)}$, then \meta{n} specifies which of the classes at $\mathtt{(x,y)}$ the structure line starts and ends at -- if n is positive, then it counts from the first class in that position, if n is negative, it counts backwards from the most recent. You can also use a |tag| for n. If the \targetcoord\ is omitted, then |\lastclass| is used, so that |\structline(\sourcecoord)| connects the most recent class to the specified coordinate. If both coordinates are omitted, then |\lastclass| and |\lastclass1| are used, and so |\structline| with no arguments at all will connect the two most recent classes.
+The |\structline| command creates a structure line from \sourcecoord\  to
+\targetcoord. The source and target coordinates are either of the form
+\pars{\meta{x},\meta{y}\opt{,\meta{n}}} or \pararg{class name}. If there are
+multiple classes at $\mathtt{(x,y)}$, then \meta{n} specifies which of the
+classes at $\mathtt{(x,y)}$ the structure line starts and ends at -- if n is
+positive, then it counts from the first class in that position, if n is
+negative, it counts backwards from the most recent. You can also use a |tag| for
+n. If the \targetcoord\ is omitted, then |\lastclass| is used, so that
+|\structline(\sourcecoord)| connects the most recent class to the specified
+coordinate. If both coordinates are omitted, then |\lastclass| and |\lastclass1|
+are used, and so |\structline| with no arguments at all will connect the two
+most recent classes.
 
-If the source or target of a structure line is hit by a differential, then on subsequent pages, the structure line disappears.
+If the source or target of a structure line is hit by a differential, then on
+subsequent pages, the structure line disappears.
 
-If the source or target has had multiple generations (i.e., they got hit and you used |\replaceclass|), then the |\structline| will only appear starting on the first page where the current generation of both the source and target are present. If this is undesirable, you can use the |structline:page| option to change it.
+If the source or target has had multiple generations (i.e., they got hit and you
+used |\replaceclass|), then the |\structline| will only appear starting on the
+first page where the current generation of both the source and target are
+present. If this is undesirable, you can use the |structline:page| option or the
+to change it. Also, the structline will disppear the first time after this the
+source or target has a differential, but this can be changed with the
+|\replacestructlines| command.
 \begin{codeexample}[width = 7.5cm]
 \DeclareSseqGroup\tower {} {
     \class(0,0)
@@ -299,15 +467,47 @@
 \end{command}
 
 \begin{command}{\structlineoptions\moptions\opt{\pars{\sourcecoord}\pars{\targetcoord}}}
-This command adds options to an existing structure line, just like |\classoptions| except for structure lines. Its syntax is identical to |\structline|.
+This command adds options to an existing structure line, just like
+|\classoptions| except for structure lines. Its syntax is identical to
+|\structline|.
 \end{command}
 
+\begin{command}{\extension\ooptions\opt{\pars{\sourcecoord}\pars{\targetcoord}}}
+The |\extension| command has an identical syntax to the |\structline| command
+and most of the same options. Instead of adding a structline, it adds an
+extension. The extensions are only shown on page $\infty$ or page ranges ending
+at $\infty$.
+
+\begin{codeexample}[width = 7.5cm]
+\begin{sseqdata}[ name = extension example,
+                  classes = { circle, fill },
+                  Adams grading, no axes,
+                  yscale = 1.28 ]
+\class(0,0) \class(0,1)
+\extension
+\end{sseqdata}
+\printpage[ name = extension example, page = 2 ] \quad
+\printpage[ name = extension example, page = \infty ]
+\end{codeexample}    
+\end{command}
+
+\begin{command}{\extensionoptions\moptions\opt{\pars{\sourcecoord}\pars{\targetcoord}}}
+This command adds options to an existing extension. Its syntax is identical to
+|\extension|.
+\end{command}
+
 \begin{command}{\circleclasses\ooptions\pars{\sourcecoord}\pars{\targetcoord}}
-This command is a lot like |\structline| except that it puts a circle around the classes instead of connecting them with a line. It might take a certain amount of fiddling with options to get |\circleclasses| to produce good results. There is no |\circleclassesoptions| command because it doesn't seem necessary and (more importantly) I didn't feel like making one. Maybe someday I'll put one in.
+This command is a lot like |\structline| except that it puts a circle around the
+classes instead of connecting them with a line. It might take a certain amount
+of fiddling with options to get |\circleclasses| to produce good results. There
+is no |\circleclassesoptions| command because it doesn't seem necessary.
 \end{command}
 
 \begin{commandlist}{\draw,\path,\node,\clip}
-Any code that would work in a \tikzpictureenv\  environment will also work unchanged in a \sseqdataenv\  or \sseqpageenv\  environment, with a few minor differences. This is a very flexible way to add arbitrary background or foreground features to the spectral sequence:
+Any code that would work in a \tikzpictureenv\  environment will also work
+unchanged in a \sseqdataenv\  or \sseqpageenv\  environment, with a few minor
+differences. This is a very flexible way to add arbitrary background or
+foreground features to the spectral sequence:
 \codeexample[from file=tikz]
 \end{commandlist}
 
@@ -314,9 +514,15 @@
 
 \section{Options for the main commands}
 \subsection{Universal options}
-The following options work with all of the drawing commands in this package, including |\class|, |\d|, and |\structline|, their friends |\replaceclass|, |\classoptions|, |\doptions|, and |\structlines|, as well as with \tikzpkg\ primitives.
+The following options work with all of the drawing commands in this package,
+including |\class|, |\d|, and |\structline|, their friends |\replaceclass|,
+|\classoptions|, |\doptions|, and |\replacestructlines|, as well as with \tikzpkg\
+primitives.
 \begin{keylist}{xshift = \meta{integer},yshift = \meta{integer}}
-Shifts by integer values are the only coordinate changes that are allowed to be applied to |\class|, |\d|, |\structline|, their relatives, or to a \scopeenv\  environment that contains any of these commands. These shift commands help with reusing code. For instance:
+Shifts by integer values are the only coordinate changes that are allowed to be
+applied to |\class|, |\d|, |\structline|, their relatives, or to a \scopeenv\
+environment that contains any of these commands. These shift commands help with
+reusing code. For instance:
 \begin{codeexample}[width = 6cm]
 \begin{sseqpage}[ cohomological Serre grading, yscale = 0.45 ]
 \foreach \x in {0,1} \foreach \y in {0,1} {
@@ -328,7 +534,9 @@
 }
 \end{sseqpage}
 \end{codeexample}
-This code segment is very useful so \sseqpages\  has the command |\NewSseqGroup| which to make code like this more convenient. The following code produces the same output as above:
+This code segment is very useful so \sseqpages\  has the command |\NewSseqGroup|
+which to make code like this more convenient. The following code produces the
+same output as above:
 \begin{codeexample}[code only,width = 6cm]
 \NewSseqGroup\examplegroup {} {
     \class(2,0)
@@ -344,11 +552,20 @@
 \end{codeexample}
 
 
-A word of warning: the behavior of |xshift| in \sseqpages\  is incompatible with the normal behavior of |xshift| in \tikzpkg. For some reason, saying |xshift = 1| in \tikzpkg\ does not shift the coordinate |(0,0)| to the coordinate |(1,0)| -- instead it shifts by 1pt. In \sseqpages\ , saying |xshift = 1| moves the coordinate |(0,0)| to the coordinate |(1,0)|. This includes \tikzpkg\ primitives: saying \codeverb|\draw[ xshift = 1 ] (0,0) -- (1,0);| inside a \sseqdataenv\  or \sseqpageenv\  environment is the same as saying \codeverb|\draw(1,0) -- (2,0);| despite the fact that this is not the case in the \tikzpictureenv\ environment.
+A word of warning: the behavior of |xshift| in \sseqpages\  is incompatible with
+the normal behavior of |xshift| in \tikzpkg. For some reason, saying%
+|xshift = 1| in \tikzpkg\ does not shift the coordinate |(0,0)| to the
+coordinate |(1,0)| -- instead it shifts by 1pt. In \sseqpages\ , saying%
+|xshift = 1| moves the coordinate |(0,0)| to the coordinate |(1,0)|. This
+includes \tikzpkg\ primitives: saying%
+\codeverb|\draw[ xshift = 1 ] (0,0) -- (1,0);| inside a \sseqdataenv\  or
+\sseqpageenv\  environment is the same as saying \codeverb|\draw(1,0) -- (2,0);|
+despite the fact that this is not the case in the \tikzpictureenv\ environment.
 \end{keylist}
 
 \begin{manualentry}{Colors}
-These come from the \LaTeX\  \colorpkg\  package via \tikzpkg, so see the \href{\colormanualurl}{\colorpkg\  package documentation} for more information.
+These come from the \LaTeX\  \colorpkg\  package via \tikzpkg, so see the
+\href{\colormanualurl}{\colorpkg\  package documentation} for more information.
 \begin{codeexample}[width = 6cm]
 \begin{sseqpage}[ classes = {fill,inner sep = 0.4em},
                   no axes, scale = 1.3 ]
@@ -366,9 +583,24 @@
 \end{manualentry}
 
 \begin{manualentry}{\pgfmanualpdflabel{""quotes}{}|"|\meta{text}|"|\opt{\meta{options}}}
-Specify a label for a class, a differential, or a structure line. This uses the \tikzpkg\ quotes syntax. If the label text includes an equal sign or comma, you need to enclose the entire label in braces, e.g., \codeverb|\class["{x = y}"](0,0)|. The options include anything you might pass as an option to a \tikzpkg\ node, including arbitrary coordinate transforms, colors, opacity options, shapes, fill, draw, etc. The behavior is a little different depending on whether you use it on a class or on a differential or structure line.
+Specify a label for a class, a differential, or a structure line. This uses the
+\tikzpkg\ quotes syntax. If the label text includes an equal sign or comma, you
+need to enclose the entire label in braces, e.g., \codeverb|\class["{x =
+y}"](0,0)|. The options include anything you might pass as an option to a
+\tikzpkg\ node, including arbitrary coordinate transforms, colors, opacity
+options, shapes, fill, draw, etc. The behavior is a little different depending
+on whether you use it on a class or on a differential or structure line.
 
-For a class, the \meta{text} is placed in the position |inside| the node by default -- in effect, the \meta{text} becomes the label text of the node (so saying |\class["label text"](0,0)| causes a similar effect to saying |\node at (0,0) {label text};|). There are other position options such as |left|, |above left|, etc which cause the label text to be placed in a separate node positioned appropriately. If the placement is above, left, etc, then any option that you may pass to a \tikzpkg\ node will also work for the label, including general coordinate transformations. If the placement is ``inside'', then the only relevant \opt{\meta{options}} are those that alter the appearance of text, such as opacity and color.
+For a class, the \meta{text} is placed in the position |inside| the node by
+default -- in effect, the \meta{text} becomes the label text of the node (so
+saying |\class["label text"](0,0)| causes a similar effect to saying%
+|\node at (0,0) {label text};|). There are other position options such as%
+|left|, |above left|, etc which cause the label text to be placed in a separate
+node positioned appropriately. If the placement is above, left, etc, then any
+option that you may pass to a \tikzpkg\ node will also work for the label,
+including general coordinate transformations. If the placement is ``inside'',
+then the only relevant \opt{\meta{options}} are those that alter the appearance
+of text, such as opacity and color.
 \begin{codeexample}[width = 4cm]
 \begin{sseqpage}[ classes = { minimum width = width("a") + 0.5em }, no axes ]
 \class["a"](0,0)
@@ -379,8 +611,13 @@
 \class["a" { above right = {1em} }](2,1)
 \end{sseqpage}
 \end{codeexample}
-You can adjust the default behavior of class labels using the |labels| style option or its relatives |class labels|, |inner class labels| or |outer class labels|.
-Note that it is also possible to give a label to a |\node| this way, although the behavior is slightly different. In particular, the label defaults to the |above| position instead of going in the |\node| text by default. Also, this won't respect the various label style options like |labels|, etc.
+You can adjust the default behavior of class labels using the |labels| style
+option or its relatives |class labels|, |inner class labels| or%
+|outer class labels|. Note that it is also possible to give a label to a |\node|
+this way, although the behavior is slightly different. In particular, the label
+defaults to the |above| position instead of going in the |\node| text by
+default. Also, this won't respect the various label style options like |labels|,
+etc.
 \begin{codeexample}[width = 6cm]
 \begin{sseqpage}[ no axes ]
 \class(0,0)
@@ -389,8 +626,10 @@
 \end{sseqpage}
 \end{codeexample}
 
-\begin{key}{pin = \meta{style}}
-The |pin| key makes \sseqpages\ draw a line connecting the label to the relevant class, which can provide necessary clarification in dense diagrams. The pin key itself can take options which adjust the way that the line is drawn:
+\begin{key}{pin = \meta{style}} %
+The |pin| key makes \sseqpages\ draw a line connecting the label to the relevant
+class, which can provide necessary clarification in dense diagrams. The pin key
+itself can take options which adjust the way that the line is drawn:
 \begin{codeexample}[width = 6cm]
 \begin{sseqpage}
 \class(0,0)
@@ -403,7 +642,10 @@
 \end{key}
 
 
-For either a |\structline| or a |\class| the label normally goes on the right side of the edge. The special option |'| makes it go in the opposite position from the default. I imitated the label handling in the \tikzcdpkg\ package, so if you use \tikzcdpkg, this should be familiar.
+For either a |\structline| or a |\class| the label normally goes on the right
+side of the edge. The special option |'| makes it go in the opposite position
+from the default. I imitated the label handling in the \tikzcdpkg\ package, so
+if you use \tikzcdpkg, this should be familiar.
 \begin{codeexample}[width = 6cm]
 \begin{sseqpage}[ Adams grading, yscale = 0.63 ]
 \class(0,0)
@@ -416,7 +658,10 @@
 \d[ "\cdot 2" { pos = 0.7, yshift = -5pt } ] 2 (1,0)
 \end{sseqpage}
 \end{codeexample}
-You can use the style options |labels|, |edge labels|, |differential labels|, and |struct line labels| to adjust the styling of edge labels. For instance, if you would prefer for the labels to default to the left hand side of the edge rather than the right hand side, you could say |edge labels = {auto = left}|.
+You can use the style options |labels|, |edge labels|, |differential labels|,
+and |struct line labels| to adjust the styling of edge labels. For instance, if
+you would prefer for the labels to default to the left hand side of the edge
+rather than the right hand side, you could say |edge labels = {auto = left}|.
 You can also use quotes to label edges drawn with \tikzpkg\ primitives:
 \begin{codeexample}[width = 6cm]
 \begin{sseqpage}[ yscale = 0.58, no axes ]
@@ -428,7 +673,11 @@
 
 \needspace{3\baselineskip}
 \begin{key}{description}
-The |description| key, stolen from \tikzcdpkg, places the label on top of the edge. In order to make this option work correctly, if the background coolor is not the default white, you must inform \sseqpages\ about this using the key |background color = |\meta{color}. In this document, the background color is called \textit{graphicbackground}.
+The |description| key, stolen from \tikzcdpkg, places the label on top of the
+edge. In order to make this option work correctly, if the background coolor is
+not the default white, you must inform \sseqpages\ about this using the key
+|background color = |\meta{color}. In this document, the background color is
+called \textit{graphicbackground}.
 \begin{codeexample}[width = 6cm]
 \begin{sseqpage}[ no axes, background color = graphicbackground ]
 \foreach \x in {0,1,2} \foreach \y in {0,1} {
@@ -445,11 +694,18 @@
 
 
 \subsection{Options for \sectionstring\class}\pgfmanualpdflabel{class options}{}
-Because the main job of the |\class| command is to print a \tikzpkg\ |\node| on the appropriate pages of the spectral sequence, most options that would work for a \tikzpkg\ node also work for the commands |\class|, |\replaceclass|, and |\classoptions|. Here are a few that you might care about:
+Because the main job of the |\class| command is to print a \tikzpkg\ |\node| on
+the appropriate pages of the spectral sequence, most options that would work for
+a \tikzpkg\ node also work for the commands |\class|, |\replaceclass|, and
+|\classoptions|. Here are a few that you might care about:
 \begin{manualentry}{A \tikzpkg\ shape}
-If you give the name of a \tikzpkg\ shape, the class node will be of that shape. The standard \tikzpkg\ shapes are |circle| and |rectangle|. \sseqpages\ defines two new shapes:
-\begin{key}{circlen = \meta{n}}
-This draws $n$ concentric circles. It's intended for indicating a $\mathbb{Z}/p^n$ summand. For large values of $n$ the result isn't all that appealing.
+If you give the name of a \tikzpkg\ shape, the class node will be of that shape.
+The standard \tikzpkg\ shapes are |circle| and |rectangle|. \sseqpages\ defines
+two new shapes:
+\begin{key}{circlen = \meta{n}}%
+This draws $n$ concentric circles. It's intended for indicating a
+$\mathbb{Z}/p^n$ summand. For large values of $n$ the result isn't all that
+appealing.
 \begin{codeexample}[]
 \begin{sseqpage}[ no axes ]
 \class[circlen = 2](0,0)
@@ -460,11 +716,13 @@
 \end{codeexample}
 \end{key}
 
-\begin{keylist}{newellipse,ellipse ratio = \meta{ratio}}
-This shape is used for |\circleclasses|. It's a variant on the |ellipse| shape that gives more control over the ellipse's aspect ratio.
+\begin{keylist}{newellipse,ellipse ratio = \meta{ratio}}%
+This shape is used for |\circleclasses|. It's a variant on the |ellipse| shape
+that gives more control over the ellipse's aspect ratio.
 \end{keylist}
 
-There are many more \tikzpkg\ shapes in the shapes library, which you can load using the command |\usetikzlibrary{shapes}|. The following are some examples:
+There are many more \tikzpkg\ shapes in the shapes library, which you can load
+using the command |\usetikzlibrary{shapes}|. The following are some examples:
 \begin{codeexample}[width = 6cm]
 \begin{sseqpage}[ no axes, classes = { inner sep = 0.4em },
                   class placement transform = { scale = 1.8 },
@@ -483,8 +741,12 @@
 See the \href{\pgfmanualurl#section.49}{\tikzpkg\  manual} for more information.
 \end{manualentry}
 
-\begin{keylist}{minimum width = \meta{dimension}, minimum height = \meta{dimension}, minimum size = \meta{dimension}, inner sep = \meta{dimension}, outer sep = \meta{dimension}}
-These options control the size of a node. This is typically useful to make the size of nodes consistent independent of the size of their label text.  For instance:
+\begin{keylist}{minimum width = \meta{dimension}, minimum height =
+\meta{dimension}, minimum size = \meta{dimension}, inner sep = \meta{dimension},
+outer sep = \meta{dimension}}%
+These options control the size of a node. This is typically useful to make the
+size of nodes consistent independent of the size of their label text.  For
+instance:
 \begin{codeexample}[width = 5cm]
 \begin{sseqdata}[ name = minimum width example, no axes, yscale = 0.8 ]
 \class["ab"](0,0)
@@ -497,10 +759,18 @@
 \end{codeexample}
 \end{keylist}
 
-\begin{key}{class:name = \meta{node name}}
-The |\class| command makes a \tikzpkg\ node on appropriate pages. You can refer to this node using \tikzpkg\ commands by using its coordinates. Using the |class:name| option, you can give the node a name, which you can use to refer to the class. Using names creates more readable code. The |show name| option can be used to display the names of classes. You can modify the names of classes systematically using the options |class name prefix|, |class name postfix|, and |class name handler|.
+\begin{key}{class:name = \meta{node name}}%
+The |\class| command makes a \tikzpkg\ node on appropriate pages. You can refer
+to this node using \tikzpkg\ commands by using its coordinates. Using the
+|class:name| option, you can give the node a name, which you can use to refer to
+the class. Using names creates more readable code. The |show name| option can be
+used to display the names of classes. You can modify the names of classes
+systematically using the options |class name prefix|, |class name postfix|, and
+|class name handler|.
 
-Named classes are immune to coordinate transformations. For example, in the following code, |xshift| does not apply to the nodes specified by |(id)| and |(eta)| but does apply to the coordinate specified by |(1,1)|:
+Named classes are immune to coordinate transformations. For example, in the
+following code, |xshift| does not apply to the nodes specified by |(id)| and
+|(eta)| but does apply to the coordinate specified by |(1,1)|:
 \begin{codeexample}[width = 6cm]
 \begin{sseqpage}[classes = { show name=above }]
 \class[class:name = 1](0,0)
@@ -514,7 +784,12 @@
 
 \begin{key}{show name = \meta{label options}}
 \declareasstyle{show name}
-This option is like saying |"class name"\marg{label options}| if the class has a name, and does nothing if the class has no name. If the class has multiple names, only the most recent is used. This is particularly useful with class styles, . For instance, by saying |this page classes = { show name = above }| you can display names of all of the sources and targets of differentials on each page.
+This option is like saying |"class name"\marg{label options}| if the class has a
+name, and does nothing if the class has no name. If the class has multiple
+names, only the most recent is used. This is particularly useful with class
+styles, . For instance, by saying |this page classes = { show name = above }|
+you can display names of all of the sources and targets of differentials on each
+page.
 \begin{codeexample}[width=7cm]
 \begin{sseqdata}[
     name = show name example,
@@ -534,8 +809,11 @@
 \end{codeexample}
 \end{key}
 
-\begin{key}{tag = \meta{tag}}
-This key adds a tag to the current class. Tags are used for identifying which of multiple classes in the same position you are referring to. They are useful when you have groups of related classes and want a family of differentials connecting them.  For instance:
+\begin{key}{tag = \meta{tag}}%
+This key adds a tag to the current class. Tags are used for identifying which of
+multiple classes in the same position you are referring to. They are useful when
+you have groups of related classes and want a family of differentials connecting
+them.  For instance:
 \begin{codeexample}[width = 8cm]
 \DeclareSseqGroup\tower {} {
     \class(0,0)
@@ -561,16 +839,27 @@
 }
 \end{sseqpage}
 \end{codeexample}
-We want each differential to go from the |h21| vee to the |id| vee, independent of which classes are in the same position of the two vees. The easy way to accomplish this is by giving tags to each of the two vees.
+We want each differential to go from the |h21| vee to the |id| vee, independent
+of which classes are in the same position of the two vees. The easy way to
+accomplish this is by giving tags to each of the two vees.
 \end{key}
 
-\begin{key}{insert = \meta{integer}}
-If there are multiple classes in the same position, this option allows you to insert classes later into earlier positions. This is intended to help you put logically related classes next to each other. If the integer is positive, it inserts the class in the specified position, and if the integer is negative, it counts backwards from the end. Providing |0| is the same as omitting the option entirely. Values larger in absolute value than the total number of classes are truncated. Consider:
+\begin{key}{insert = \meta{integer}}%
+If there are multiple classes in the same position, this option allows you to
+insert classes later into earlier positions. This is intended to help you put
+logically related classes next to each other. If the integer is positive, it
+inserts the class in the specified position, and if the integer is negative, it
+counts backwards from the end. Providing |0| is the same as omitting the option
+entirely. Values larger in absolute value than the total number of classes are
+truncated. Consider:
 \codeexample[from file=insert]
 \end{key}
 
-\begin{key}{offset = \{\pars{\meta{x offset},\meta{y offset}}\}}
-By default, a class uses the offset specified by |class pattern|. Occasionally this is undesirable. In this case, you can specify the offset for a particular class by hand. For example if the sum of two classes is hit by a differential, it looks better for the class replacing them to be centered:
+\begin{key}{offset = \{\pars{\meta{x offset},\meta{y offset}}\}}%
+By default, a class uses the offset specified by |class pattern|. Occasionally
+this is undesirable. In this case, you can specify the offset for a particular
+class by hand. For example if the sum of two classes is hit by a differential,
+it looks better for the class replacing them to be centered:
 \begin{codeexample}[width = 9cm]
 \begin{sseqdata}[ name = offset example,
     xscale = 0.7,
@@ -592,12 +881,29 @@
 \end{codeexample}
 \end{key}
 
-\begin{key}{tooltip = \meta{text}}
-This key generates a ``tooltip'' over the given class. That is, if you hover your mouse over it, a little window will popup with the tooltip text. This is particularly useful to give the coordinates or names of classes in large charts where it may be hard to tell from looking at the picture what position the class is in, or there may not be room to supply names to classes.
+\begin{key}{tooltip = \meta{text}}%
+This key generates a ``tooltip'' over the given class. That is, if you hover
+your mouse over it, a little window will popup with the tooltip text. This is
+particularly useful to give the coordinates or names of classes in large charts
+where it may be hard to tell from looking at the picture what position the class
+is in, or there may not be room to supply names to classes.
 
-The tooltip is made using the |\pdftooltip| command from the |pdfcomment| package. The |pdfcomment| package generates two extra auxiliary files, so it is not included by default. In order to use the |tooltip| option, you have to use the |tooltips| package option (e.g., load \sseqpages\ with |\usepackage[tooltips]{spectralsequences}|). This cannot handle math, but it will print math expressions into \TeX\ input form. Not all pdf viewers will display the tooltip correctly. If this concerns you, the command |\sseqtooltip| is used to produce the tooltip, and you can redefine it as any other command that takes |\sseqtooltip|\marg{text}\marg{tooltip text} and produces a tooltip. For instance, on \href{https://tex.stackexchange.com/a/164186/23866}{this stack exchange post}, there is code that supposedly produces tooltips that work with Evince. I have not tested whether it works by itself or whether it works with my package, but you could. You could potentially figure out how to get math to work in tooltips too -- if you find a satisfactory method, please let me know.
+The tooltip is made using the |\pdftooltip| command from the |pdfcomment|
+package. The |pdfcomment| package generates two extra auxiliary files, so it is
+not included by default. In order to use the |tooltip| option, you have to use
+the |tooltips| package option (e.g., load \sseqpages\ with
+|\usepackage[tooltips]{spectralsequences}|). This cannot handle math, but it
+will print math expressions into \TeX\ input form. Not all pdf viewers will
+display the tooltip correctly. If this concerns you, the command |\sseqtooltip|
+is used to produce the tooltip, and you can redefine it as any other command
+that takes |\sseqtooltip|\marg{text}\marg{tooltip text} and produces a tooltip.
+For instance, on \href{https://tex.stackexchange.com/a/164186/23866}{this stack
+exchange post}, there is code that supposedly produces tooltips that work with
+Evince. I have not tested whether it works by itself or whether it works with my
+package, but you could. You could potentially figure out how to get math to work
+in tooltips too -- if you find a satisfactory method, please let me know.
 
-Anyways, here's an example:
+Here's an example:
 \begin{codeexample}[]
 \begin{sseqpage}[classes = {tooltip = {(\xcoord,\ycoord)}}]
 \class(0,0)
@@ -607,13 +913,19 @@
 \end{sseqpage}
 \end{codeexample}
 
-There's another example at the beginning of the section on the \hyperref[sec:class stack]{class stack}.
+There's another example at the beginning of the section on the
+\hyperref[sec:class stack]{class stack}.
 \end{key}
 
-\begin{keylist}{class:page = \meta{page}\opt{-{}-\meta{page max}},generation = \meta{generation}\opt{-{}-\meta{generation max}}}
+\begin{keylist}{
+    class:page = \meta{page}\opt{-{}-\meta{page max}},
+    generation = \meta{generation}\opt{-{}-\meta{generation max}}
+}
 \def\classpagehandler#1#2{\textcolor{keycolor}{\noligs{#2}}}
 \declarecustomhandler{class:page}{\classpagehandler}
-These options only work in |\classoptions|. The |page| option gives a range of pages for which the options apply to. If only one page is specified, it is the minimum page and the option applies to all larger pages.
+These options only work in |\classoptions|. The |page| option gives a range of
+pages for which the options apply to. If only one page is specified, it is the
+minimum page and the option applies to all larger pages.
 \begin{codeexample}[width = 6cm]
 \begin{sseqdata}[ name = page_example, no axes,
     title = \page, title style = {yshift = -0.5cm} ]
@@ -625,22 +937,36 @@
 \printpage[ name = page_example, page = 2 ] \qquad
 \printpage[ name = page_example, page = 4 ]
 \end{codeexample}
-A ``generation'' of a class is the interval from one call of |\class| or |\replaceclass| to the page on which it next supports or is hit by a differential.
-By default the |\classoptions| command adds options only to the most recent generation of the class in a \sseqdataenv\  environment, or on the generation appropriate to the current page in a \sseqpageenv\  environment. Using the |generation| option allows you to provide a single generation or range of generations of the class that the options should apply to. The first generation is generation 0, and the most recent generation is generation -1. Larger negative values count backwards.
+A ``generation'' of a class is the interval from one call of |\class| or
+|\replaceclass| to the page on which it next supports or is hit by a
+differential. By default the |\classoptions| command adds options only to the
+most recent generation of the class in a \sseqdataenv\  environment, or on the
+generation appropriate to the current page in a \sseqpageenv\  environment.
+Using the |generation| option allows you to provide a single generation or range
+of generations of the class that the options should apply to. The first
+generation is generation 0, and the most recent generation is generation -1.
+Larger negative values count backwards.
 \codeexample[from file=class-page2a]
 \codeexample[from file=class-page2b]
 \end{keylist}
 
 \begin{commandlist}{\xcoord,\ycoord}
-These commands represent the $\mathtt{x}$ and $\mathtt{y}$ coordinate of the current class when used in class options. The only use I have for them is in the |tooltip| option, but maybe there is some other purpose for them.
+These commands represent the $\mathtt{x}$ and $\mathtt{y}$ coordinate of the
+current class when used in class options. The only use I have for them is in the
+|tooltip| option, but maybe there is some other purpose for them.
 \end{commandlist}
 
 
-\subsection{Options for \sectionstring\d\ and \sectionstring\structline}
-Because the main job of the |\d| and |\structline| commands is to print an edge on the appropriate pages of the spectral sequence, most \tikzpkg\ options that you could apply to a \tikzpkg\ ``to'' operator (as in |\draw (x1,y1) to (x2,y2);|) can be applied to both |\d| and |\structline|. Some such options are as follows:
+\subsection{Options for \sectionstring\d, \sectionstring\structline, and \sectionstring\extension}
+Because the main job of the |\d|, |\structline|, and |\extension| commands is to
+print an edge on the appropriate pages of the spectral sequence, most \tikzpkg\
+options that you could apply to a \tikzpkg\ ``to'' operator (as in%
+|\draw (x1,y1) to (x2,y2);|) can be applied to |\d|, |\structline|, and
+|\extension|. Some such options are as follows:
 
 \begin{keylist}{source anchor = \meta{anchor}, target anchor = \meta{anchor}}
-Because you can't use the normal \tikzpkg\ mechanism for specifying the source and target anchors, \sseqpages\  has these two keys for |\d| and |\structline|:
+Because you can't use the normal \tikzpkg\ mechanism for specifying the source
+and target anchors, \sseqpages\  has these two keys for |\d| and |\structline|:
 \begin{codeexample}[width = 4cm]
 \begin{sseqpage}[ no axes, yscale = 1.24 ]
 \foreach \x in {0,1} \foreach \y in {0,1} {
@@ -653,12 +979,15 @@
 \end{keylist}
 
 
-\begin{keylist}{shorten > = \meta{distance}, shorten < = \meta{distance}}
-These behave exactly like the corresponding options from \tikzpkg\ , shortening the end and beginning of the edge respectively. Note that you can lengthen the edge by shortening by a negative amount.
+\begin{keylist}{shorten > = \meta{distance}, shorten < = \meta{distance}}%
+These behave exactly like the corresponding options from \tikzpkg\ , shortening
+the end and beginning of the edge respectively. Note that you can lengthen the
+edge by shortening by a negative amount.
 \end{keylist}
 
 \begin{manualentry}{Dash patterns:}
-See the \href{\pgfmanualurl#subsubsection.15.3.2}{\tikzpkg\  manual} for a complete explanation of the dash pattern related options. Some examples:
+See the \href{\pgfmanualurl#subsubsection.15.3.2}{\tikzpkg\  manual} for a
+complete explanation of the dash pattern related options. Some examples:
 \begin{codeexample}[width = 6cm]
 \begin{sseqpage}[ no axes, yscale = 1.6 ]
 \foreach \x in {0,1,2} \foreach \y in {0,1} {
@@ -672,7 +1001,10 @@
 %
 \end{manualentry}
 
-\begin{keylist}{bend left = \meta{angle}, bend right = \meta{angle}, *in = \meta{anchor}, *out = \meta{anchor}}
+\begin{keylist}{%
+    bend left = \meta{angle}, bend right = \meta{angle},%
+    *in = \meta{anchor}, *out = \meta{anchor}%
+}%
 \begin{codeexample}[width = 6cm]
 \begin{sseqpage}[no axes,yscale = 1.6]
 \foreach \x in {0,1,2} \foreach \y in {0,1} {
@@ -686,11 +1018,18 @@
 \end{keylist}
 
 %\begin{key}{invisible}
-%This key is only for |\d|. It prevents a differential from being drawn at all. The typical reason you might want this is so that you can draw your own differential using \tikzpkg\  commands. See |\getdtarget| for an example of this.
-%\end{key}
+%
+% This key is only for |\d|. It prevents a differential from being drawn at all.
+% The typical reason you might want this is so that you can draw your own
+% differential using \tikzpkg\  commands. See |\getdtarget| for an example of
+% this.
+%
+% \end{key}
 
-\begin{key}{structline:page = \meta{page}\opt{-{}-\meta{page max}}}
-This key is only for |\structline| and |\structlineoptions|. By default, the |\structline| command only adds a structure line starting on the page where the most recent generation of the source or target is born:
+\begin{key}{structline:page = \meta{page}\opt{-{}-\meta{page max}}}%
+This key is only for |\structline| and |\structlineoptions|. By default, the
+|\structline| command only adds a structure line starting on the page where the
+most recent generation of the source or target is born:
 
 \begin{codeexample}[width = 7.6cm]
 \begin{sseqdata}[ name = structpage example,
@@ -708,7 +1047,8 @@
 \printpage[name = structpage example,page = 4]
 \end{codeexample}
 
-By specifying a page number, you can adjust which page the |\structline| starts on:
+By specifying a page number, you can adjust which page the |\structline| starts
+on:
 
 \begin{codeexample}[]
 \begin{sseqdata}[ name = structpage example2, title = \page, yscale = 0.5 ]
@@ -729,12 +1069,15 @@
 \printpage[ name = structpage example2, page = 4 ]
 \end{codeexample}
 
-Similarly, for |\structlineoptions| you can specify a minimum page on which to apply the options, or a range of pages.
+Similarly, for |\structlineoptions| you can specify a minimum page on which to
+apply the options, or a range of pages.
 \end{key}
 
 \subsection{Options for \sectionstring\circleclass}
-\begin{key}{fit = \meta{coordinates or nodes}}
-The |\circleclasses| command uses the \href{\pgfmanualurl#section.52}{\tikzpkg\  fitting library}. Sometimes it's desirable to make the resulting node fit extra things, for example a label. It doesn't necessarily end up looking great though.
+\begin{key}{fit = \meta{coordinates or nodes}}%
+The |\circleclasses| command uses the \href{\pgfmanualurl#section.52}{\tikzpkg\
+fitting library}. Sometimes it's desirable to make the resulting node fit extra
+things, for example a label. It doesn't necessarily end up looking great though.
 \begin{codeexample}[]
 \begin{sseqpage}[ Adams grading, axes gap = 0.7cm ]
 \class(0,2)
@@ -747,35 +1090,57 @@
 \end{key}
 
 \begin{key}{rounded rectangle}
-You can put a shape as an option and it will change the shape of the node drawn by |\circleclasses|. Any shape will do, but I think that an |ellipse| or |rounded rectangle| are the only particularly appealing options.
+You can put a shape as an option and it will change the shape of the node drawn
+by |\circleclasses|. Any shape will do, but I think that an |ellipse| or
+|rounded rectangle| are the only particularly appealing options.
 \end{key}
 
-\begin{key}{ellipse ratio = \meta{ratio} (initially 1.2)}
-By default, the shape drawn by |\circleclasses| is a ``newelipse'' which is a custom defined shape that respects the option |elipse ratio| which roughly controls how long and skinny versus short and fat the ellipse is. If you find that the ellipse is too long, try a larger value of this option, and conversely if it's too fat try a smaller value. If no value is satisfactory, try out the |rounded rectangle| shape. (This is stolen from the following stack exchange answer: \url{https://tex.stackexchange.com/a/24621}.)
+\begin{key}{ellipse ratio = \meta{ratio} (initially 1.2)}%
+By default, the shape drawn by |\circleclasses| is a ``newelipse'' which is a
+custom defined shape that respects the option |elipse ratio| which roughly
+controls how long and skinny versus short and fat the ellipse is. If you find
+that the ellipse is too long, try a larger value of this option, and conversely
+if it's too fat try a smaller value. If no value is satisfactory, try out the
+|rounded rectangle| shape. (This is stolen from the following stack exchange
+answer: \url{https://tex.stackexchange.com/a/24621}.)
 \end{key}
 
-\begin{keylist}{cc:class style,cc:permanent cycle style,cc:transient cycle style,cc:this page class style,cc:differential style,cc:struct line style}
-See the \pgfmanualpdfref{class style}{corresponding entry} in the \tikzpkg\  primitives section.
+\begin{keylist}{
+    cc:class style,cc:permanent cycle style,cc:transient cycle style,
+    cc:this page class style,cc:differential style,cc:struct line style
+}
+See the \pgfmanualpdfref{class style}{corresponding entry} in the \tikzpkg\
+primitives section.
 \end{keylist}
 
-\begin{key}{cc:page = \meta{page}\opt{-{}-\meta{page max}}}
-By default, the ellipse will be drawn on the same set of pages that a structure line between the two classes would be drawn on. This specifies a range of pages for the ellipse to be drawn. Note that unlike with structure lines, you can instruct |\circleclasses| to draw the shape even on pages where one or both of the classes that it is fitting are dead.
+\begin{key}{cc:page = \meta{page}\opt{-{}-\meta{page max}}}%
+By default, the ellipse will be drawn on the same set of pages that a structure
+line between the two classes would be drawn on. This specifies a range of pages
+for the ellipse to be drawn. Note that unlike with structure lines, you can
+instruct |\circleclasses| to draw the shape even on pages where one or both of
+the classes that it is fitting are dead.
 \end{key}
 
 \subsection{Options for \tikzpkg\  primitives}
-\begin{key}{background}
-This key instructs \sseqpages\  to put the current \tikzpkg\  primitive in the background. The way that the spectral sequence is printed is as follows:
+\begin{key}{background}%
+This key instructs \sseqpages\  to put the current \tikzpkg\  primitive in the
+background. The way that the spectral sequence is printed is as follows:
 \begin{itemize}
-\item The title, axes, axes ticks, and axes labels are printed (the appropriate steps are skipped when the |no title|, |no axes|, |no ticks|, or |no labels| keys are used or if no title or axes labels are provided).
+\item The title, axes, axes ticks, and axes labels are printed (the appropriate
+steps are skipped when the |no title|, |no axes|, |no ticks|, or |no labels|
+keys are used or if no title or axes labels are provided).
 
 \item The \tikzpkg\  background paths are printed.
 
 \item The clipping is inserted (unless the |no clip| key is used).
 
-\item All foreground elements (classes, differentials, structure lines, and normal \tikzpkg\  paths) are printed.
+\item All foreground elements (classes, differentials, structure lines, and
+normal \tikzpkg\  paths) are printed.
 \end{itemize}
 
-In particular, this means that foreground \tikzpkg\  paths can be clipped by the standard clipping, but background paths that are outside of the clipping expand the size of the \tikzpkg\  picture.
+In particular, this means that foreground \tikzpkg\  paths can be clipped by the
+standard clipping, but background paths that are outside of the clipping expand
+the size of the \tikzpkg\  picture.
 \begin{codeexample}[]
 \begin{sseqpage}[ no ticks, yscale = 0.9, math nodes = false ]
 \class(0,0)
@@ -787,7 +1152,9 @@
 \node at (0.5,-0.4) {clipped};
 \end{sseqpage}
 \end{codeexample}
-Here is an example where \tikzpkg\ labels with the |background| key are used to add labels and a grid. Note that this styling is easier to make using the |title|, |x label|, |y label|, and |grid| options.
+Here is an example where \tikzpkg\ labels with the |background| key are used to
+add labels and a grid. Note that this styling is easier to make using the
+|title|, |x label|, |y label|, and |grid| options.
 \begin{codeexample}[]
 \begin{sseqdata}[ name = tikz background example, cohomological Serre grading, classes = fill ]
 \begin{scope}[background]
@@ -806,7 +1173,8 @@
 \printpage[name = tikz background example, page = 3]
 \end{codeexample}
 
-For this particular use case, it's probably better to use |title|, |x label|, and |y label|:
+For this particular use case, it's probably better to use |title|, |x label|,
+and |y label|:
 \begin{codeexample}[]
 \begin{sseqdata}[ name = tikz background example2, cohomological Serre grading, classes = fill,
                   grid = go, title = { Page \page }, x label = { $H^*(B)$ }, y label = { $H^*(F)$ } ]
@@ -820,9 +1188,15 @@
 \printpage[name = tikz background example2, page = 3]
 \end{codeexample}
 
-But if you need more flexible labeling, you'll likely want to use tikz primitives with |background|. See \example{KF3} for an instance where this key is useful.
+But if you need more flexible labeling, you'll likely want to use tikz
+primitives with |background|. See \example{KF3} for an instance where this key
+is useful.
 
-One useful tip is that you can ensure consistent bounding boxes between different diagrams using |\path[background] (smallest x, smallest y) -- (largest x, largest y);|:
+One useful tip is that you can ensure consistent bounding boxes between
+different diagrams using%
+\begin{center}
+|\path[background] (smallest x, smallest y) -- (largest x, largest y);|:
+\end{center}
 \begin{codeexample}[]
 \begin{sseqdata}[ name = boundingboxex, x range = {0}{2}, y range = {0}{2}, scale = 0.5 ]
 \end{sseqdata}
@@ -840,24 +1214,40 @@
 
 \begin{keylist}{page constraint = \meta{predicate}, page constraint or = \meta{predicate}}
 \declarecustomhandler{page constraint}{\codehandler}
-This places a constraint on the pages in which the \tikzpkg\  primitive is printed. This predicate should look something like
-\texttt{(\string\page\ <= 4)} |&&| \texttt{(\string\page\ >= 3)}. The predicate is anded together with any previous predicates, so that you can use this as an option for a \scopeenv\  and again for the individual \tikzpkg\ primitive.
+This places a constraint on the pages in which the \tikzpkg\  primitive is
+printed. This predicate should look something like \texttt{(\string\page\ <= 4)}
+|&&| \texttt{(\string\page\ >= 3)}. The predicate is anded together with any
+previous predicates, so that you can use this as an option for a \scopeenv\  and
+again for the individual \tikzpkg\ primitive.
 
 \begin{commandlist}{\isalive\pararg{coordinate},\isalive\{\pararg{coordinate 1}$\cdots$\pararg{coordinate n}\}}
 This command can only be used with |page constraint|. Saying
-\[|page constraint = {\pars{\meta{x},\meta{y}\opt{,}\oarg{index}}}}}|\]
+\begin{center}
+    |page constraint = {\pars{\meta{x},\meta{y}\opt{,}\oarg{index}}}}}|
+\end{center}
 will print the \tikzpkg\  primitive only on pages where the specified class is alive. Saying
-\[|page constraint = {\isalive(\meta{coordinate 1})|\,\cdots\,|(\meta{coordinate n})}|\]
+\begin{center}
+    |page constraint = {\isalive(\meta{coordinate 1})|$\,\cdots\,$|(\meta{coordinate n})}|
+\end{center}
 is equivalent to
-\[|page constraint = {\isalive\pararg{coordinate 1} &&|\,\cdots\,|&& \isalive\pararg{coordinate n}}|\]
+\begin{center}
+    |page constraint = {\isalive\pararg{coordinate 1} &&|$\,\cdots\,$|&& \isalive\pararg{coordinate n}}|
+\end{center}
 Writing
-\[\codeverb|\draw[page constraint = {\isalive(1,0)(2,2)}](1,0)|\texttt{-{}-}|(2,2);|\]
-is the same as |\structline(1,0)(2,2)|, except that you can't later use |\structlineoptions| on it (and it won't have the |struct lines| style applied).
+\begin{center}
+    \codeverb|\draw[page constraint = {\isalive(1,0)(2,2)}](1,0)|\texttt{-{}-}|(2,2);|
+\end{center}
+is the same as |\structline(1,0)(2,2)|, except that you can't later use
+|\structlineoptions| on it (and it won't have the |struct lines| style applied).
 \end{commandlist}
 \end{keylist}
 
-\begin{keylist}{class style,permanent cycle style,transient cycle style,this page class style,differential style,struct line style}
-These classes apply the styling of the corresponding element to your \tikzpkg\  commands.
+\begin{keylist}{c
+    lass style,permanent cycle style,transient cycle style,
+    this page class style,differential style,struct line style
+}
+These classes apply the styling of the corresponding element to your \tikzpkg\
+commands.
 \begin{codeexample}[width = 6cm]
 \begin{sseqpage}[ differentials = blue, yscale = 0.65, no axes ]
 \class(0,2)
@@ -873,8 +1263,17 @@
 
 \section{Miscellaneous Commands}
 \subsection{Settings}
-\begin{command}{\sseqset\marg{keys}}
-The |\sseqset| command is for adjusting the global options for all spectral sequences in the current scope, or for applying options to the rest of the current spectral sequence. For instance, if most of the spectral sequences in the current document are going to be Adams graded, you can say |\sseqset{Adams grading}| and all future spectral sequences in the current scope will have Adams grading (unless you specify a different grading explicitly). As another example, |\sseqset{no axes}| will suppress axes from spectral sequences in the current scope. Note that defaults only apply to new \sseqdataenv\ environments or to unnamed \sseqpageenv\ environments; they won't apply to existing spectral sequences.
+\begin{command}{\sseqset\marg{keys}}%
+The |\sseqset| command is for adjusting the global options for all spectral
+sequences in the current scope, or for applying options to the rest of the
+current spectral sequence. For instance, if most of the spectral sequences in
+the current document are going to be Adams graded, you can say%
+|\sseqset{Adams grading}| and all future spectral sequences in the current scope
+will have Adams grading (unless you specify a different grading explicitly). As
+another example, |\sseqset{no axes}| will suppress axes from spectral sequences
+in the current scope. Note that defaults only apply to new \sseqdataenv\
+environments or to unnamed \sseqpageenv\ environments; they won't apply to
+existing spectral sequences.
 
 You can also use |\sseqset| to create styles to be used in spectral sequences.
 \begin{keylist}{
@@ -882,8 +1281,12 @@
     .global sseq append style = \meta{keys},
     .sseq style = \meta{keys},
     .sseq append style = \meta{keys}
-}
-These handlers create reusable styles to be used in spectral sequences. If this style is a set of global options, then use the |.global sseq style| handler, whereas if it is supposed to be applied to individual features (classes, differentials, structure lines, circle classes, and tikz primitives) then use the |.sseq style| handler.
+}%
+These handlers create reusable styles to be used in spectral sequences. If this
+style is a set of global options, then use the |.global sseq style| handler,
+whereas if it is supposed to be applied to individual features (classes,
+differentials, structure lines, circle classes, and tikz primitives) then use
+the |.sseq style| handler.
 \begin{codeexample}[width=6cm]
 \sseqset{
     mysseq/.global sseq style = {
@@ -907,21 +1310,44 @@
 \end{keylist}
 \end{command}
 
-\begin{command}{\SseqErrorToWarning\meta{error-name}}
-Turns the error with the given name into a warning. An error message will start by saying \let\eatclnifpresent\empty|spectralsequences error: "error-name"|. This is the name you need to put into this command.
+\begin{command}{\SseqErrorToWarning\meta{error-name}}%
+Turns the error with the given name into a warning. An error message will start
+by saying \let\eatclnifpresent\empty|spectralsequences error: "error-name"|.
+This is the name you need to put into this command.
 \end{command}
 
-\begin{environment}{{quiet}}
-This environment quiets error messages that occur inside of it. \sseqpages\ is pretty good at error recovery, and so most of commands will fail gracefully and do nothing if their preconditions aren't met. If there are any parsing errors in the body of the |{quiet}| environment, prepare to see low level internal error messages. You might also run into bugs in \sseqpages\ -- the error recovery code hasn't been that carefully tested. If you do get low level error messages, remember to comment out the |{quiet}| environment before trying to debug.
+\begin{environment}{{quiet}}%
+This environment quiets error messages that occur inside of it. \sseqpages\ is
+pretty good at error recovery, and so most of commands will fail gracefully and
+do nothing if their preconditions aren't met. If there are any parsing errors in
+the body of the |{quiet}| environment, prepare to see low level internal error
+messages. You might also run into bugs in \sseqpages\ -- the error recovery code
+hasn't been that carefully tested. If you do get low level error messages,
+remember to comment out the |{quiet}| environment before trying to debug.
 
-This is particularly useful for code reuse commands. Sometimes there is a source of long differentials that only applies to classes that haven't already supported shorter differentials. Sometimes there should be a structure line if a certain class exists, but it might not exist. In these cases, the |{quiet}| environment will help you out. See also |\DrawIfValidDifferential|, which is a variant of |\d| that behaves as if it were inside a |{quiet}| environment.
+This is particularly useful for code reuse commands. Sometimes there is a source
+of long differentials that only applies to classes that haven't already
+supported shorter differentials. Sometimes there should be a structure line if a
+certain class exists, but it might not exist. In these cases, the |{quiet}|
+environment will help you out. See also |\DrawIfValidDifferential|, which is a
+variant of |\d| that behaves as if it were inside a |{quiet}| environment.
 \end{environment}
 
 \subsection{Code reuse commands}
-\begin{command}{\foreach }
-This command is from \tikzpkg\  and works in pretty much the same way in \sseqpages, though with slightly better variants. The |\foreach| command is very flexible and has a lot of variants. The basic usage is |\foreach \x in {\meta{xmin},...,\meta{xmax}} \marg{loop body}| which will execute |\meta{loop body}| with |\x| set to each value between \meta{xmin} and \meta{xmax} inclusive. If you want a step greater than 1, try |\foreach \x in {\meta{xmin},\meta{xmin}+\meta{xstep},...,\meta{xmax}} \marg{loop body}|.
+\begin{command}{\foreach }%
+This command is from \tikzpkg\  and works in pretty much the same way in
+\sseqpages, though with slightly better variants. The |\foreach| command is very
+flexible and has a lot of variants. The basic usage is%
+|\foreach \x in {\meta{xmin},...,\meta{xmax}} \marg{loop body}| which will
+execute |\meta{loop body}| with |\x| set to each value between \meta{xmin} and
+\meta{xmax} inclusive. If you want a step greater than 1, try%
+%
+\begin{center}
+|\foreach \x in {\meta{xmin},\meta{xmin}+\meta{xstep},...,\meta{xmax}}\marg{loop body}|.
+\end{center}
 
-If you need to do multiple loops with a common body, you can just stack the |\foreach| commands:
+If you need to do multiple loops with a common body, you can just stack the
+|\foreach| commands:
 \begin{codeexample}[width=6cm]
 \begin{sseqpage}[ xscale = 0.5, x tick step = 2 ]
 \foreach \x in {0,2,...,6}
@@ -939,9 +1365,12 @@
 }
 \end{sseqpage}
 \end{codeexample}
-See the last example for |normalize monomial| for a better example of this usage.
+See the last example for |normalize monomial| for a better example of this
+usage.
 
-There are tons of other things you can do with |\foreach|, though I haven't yet found need for them in combination with \sseqpages. See the \href{\pgfmanualurl#section.64}{\tikzpkg\  manual} for more details.
+There are tons of other things you can do with |\foreach|, though I haven't yet
+found need for them in combination with \sseqpages. See the
+\href{\pgfmanualurl#section.64}{\tikzpkg\  manual} for more details.
 \end{command}
 
 \begin{commandlist}{
@@ -949,8 +1378,16 @@
     \DoUntilOutOfBounds\meta{loop body},
     \DoUntilOutOfBoundsThenNMore\marg{extra iterations}\meta{loop body},
     \iteration
-}
-The one use case that |\foreach| doesn't cover all that well is if you want the loop to always repeat until the features you are drawing go off the page. This is what |\DoUntilOutOfBounds| and |\DoUntilOutOfBoundsThenNMore| are for. These help ensure that if you change the range of your chart, infinite families will automatically be drawn correctly without the need to adjust a bunch of loop bounds. The purpose of |\DoUntilOutOfBoundsThenNMore| is for towers that are receiving a differential. If your spectral sequence is Adams graded, and a tower is receiving a $d_r$ differential from another tower, you should use |\DoUntilOutOfBoundsThenNMore{r}|:
+}%
+The one use case that |\foreach| doesn't cover all that well is if you want the
+loop to always repeat until the features you are drawing go off the page. This
+is what |\DoUntilOutOfBounds| and |\DoUntilOutOfBoundsThenNMore| are for. These
+help ensure that if you change the range of your chart, infinite families will
+automatically be drawn correctly without the need to adjust a bunch of loop
+bounds. The purpose of |\DoUntilOutOfBoundsThenNMore| is for towers that are
+receiving a differential. If your spectral sequence is Adams graded, and a tower
+is receiving a $d_r$ differential from another tower, you should use
+|\DoUntilOutOfBoundsThenNMore{r}|:
 \begin{codeexample}[width=7cm]
 \begin{sseqpage}[
     Adams grading, classes = fill,
@@ -991,20 +1428,41 @@
 }
 \end{sseqpage}
 \end{codeexample}
-One important difference between |\foreach| and the |\Do| family of commands is that |\Do| has no effect on the stack. This is in order to ensure that they nest properly.
+One important difference between |\foreach| and the |\Do| family of commands is
+that |\Do| has no effect on the stack. This is in order to ensure that they nest
+properly.
 
-Note that if you are using these commands and you are planning to draw several pictures of the chart with restricted range, you need to specify a range for the \sseqdataenv\ that contains all of the ranges of pages that you want to draw. If you then want to set a smaller default range, specify the smaller range the first time you use \sseqpageenv\ or |\printpage| to draw the spectral sequence, and include the |keep changes| key.
+Note that if you are using these commands and you are planning to draw several
+pictures of the chart with restricted range, you need to specify a range for the
+\sseqdataenv\ that contains all of the ranges of pages that you want to draw. If
+you then want to set a smaller default range, specify the smaller range the
+first time you use \sseqpageenv\ or |\printpage| to draw the spectral sequence,
+and include the |keep changes| key.
 
-The |\Do| command is less general than |\foreach|; the purpose is to provide a syntax for stack-based looping that is similar to |\DoUntilOutOfBounds| but with a fixed range. So |\Do{n}\marg{loop body}| repeats \meta{loop body} |n| times. The assumption is that the loop body draws something relative to the position of the |\lastclass|.
+The |\Do| command is less general than |\foreach|; the purpose is to provide a
+syntax for stack-based looping that is similar to |\DoUntilOutOfBounds| but with
+a fixed range. So |\Do{n}\marg{loop body}| repeats \meta{loop body} |n| times.
+The assumption is that the loop body draws something relative to the position of
+the |\lastclass|.
 
-If you need to know how many iterations one of these three commands has gone through, this is stored in the variable |\iteration|.
+If you need to know how many iterations one of these three commands has gone
+through, this is stored in the variable |\iteration|.
 \end{commandlist}
 \begin{commandlist}{\NewSseqCommand    \cmdarg{command}\marg{argspec}\marg{body},
                     \DeclareSseqCommand\cmdarg{command}\marg{argspec}\marg{body}}
 % TODO: Explain the difference between NewSseqCommand and DeclareSseqCommand!
-The \xparsepkg\ package provides these very powerful commands for defining macros. They are used internally to the \sseqpages\  package to define |\class|, |\d|, etc. To help you create variants of these commands, I will record here the argument specifications for each of them. See the \href{\xparseurl}{\xparsepkg\ manual} for a better explanation and more information.
+The \xparsepkg\ package provides these very powerful commands for defining
+macros. They are used internally to the \sseqpages\  package to define |\class|,
+|\d|, etc. To help you create variants of these commands, I will record here the
+argument specifications for each of them. See the \href{\xparseurl}{\xparsepkg\
+manual} for a better explanation and more information.
 
-To make a command like |\class|, you can use the argument specification |O{}r()|. The argument type \texttt{O\marg{default}} stands for a bracket delimited optional argument with default value \meta{default}. In this case, we've specified the default to be empty. |r()| stands for a ``required'' argument delimited by |(| and |)|. In the command definition, access the optional argument with |#1| and the coordinate with |#2|.
+To make a command like |\class|, you can use the argument specification
+|O{}r()|. The argument type \texttt{O\marg{default}} stands for a bracket
+delimited optional argument with default value \meta{default}. In this case,
+we've specified the default to be empty. |r()| stands for a ``required''
+argument delimited by |(| and |)|. In the command definition, access the
+optional argument with |#1| and the coordinate with |#2|.
 \begin{codeexample}[width = 6.5cm,vbox]
 \DeclareDocumentCommand\demo{ O{} r() }
     {  \#1 = \textcolor{purple}{\{#1\}};
@@ -1014,7 +1472,14 @@
 \hbox{\demo(1,2,3)}
 \end{codeexample}
 % TODO: explain what u does better
-If you want to separate out the coordinates into different arguments, you can use |O{}u(u,u)|. The argument type |u| stands for ``until'' and scans up until the next instance of the given character. So in this case, |#1| is of argument type |O| which is an option list, |#2| corresponds to the |u(| which is a throw-away argument, then |#3| corresponds to |u,| and contains the $\mathtt{x}$ coordinate, and |#4| corresponds to |u)| and contains the $\mathtt{y}$ coordinate. Note however that this will not match balanced parenthetical expressions.
+If you want to separate out the coordinates into different arguments, you can
+use |O{}u(u,u)|. The argument type |u| stands for ``until'' and scans up until
+the next instance of the given character. So in this case, |#1| is of argument
+type |O| which is an option list, |#2| corresponds to the |u(| which is a
+throw-away argument, then |#3| corresponds to |u,| and contains the $\mathtt{x}$
+coordinate, and |#4| corresponds to |u)| and contains the $\mathtt{y}$
+coordinate. Note however that this will not match balanced parenthetical
+expressions.
 \begin{codeexample}[width = 6.5cm,vbox]
 \DeclareDocumentCommand\demo{ O{} u( u, u)}
     {  \#1 = \textcolor{purple}{\{#1\}};
@@ -1028,7 +1493,9 @@
 \bigskip
 \hbox{\demo(1,(1+1)*2)} % uh-oh -- *2) is left off!
 \end{codeexample}
-You can specify an optional argument delimited by parentheses using |d()|. Use the commands |\IfNoValueTF|, |\IfNoValueT|, and |\IfNoValueF| to test whether the user provided a value.
+You can specify an optional argument delimited by parentheses using |d()|. Use
+the commands |\IfNoValueTF|, |\IfNoValueT|, and |\IfNoValueF| to test whether
+the user provided a value.
 \begin{codeexample}[width = 6.5cm,vbox]
 \DeclareDocumentCommand\demo{ O{} d() } {
        \#1 = \textcolor{purple}{\{#1\}};
@@ -1088,8 +1555,14 @@
 \end{commandlist}
 
 \begin{commandlist}{\NewSseqGroup\cmdarg{command}\marg{argspec}\marg{body},
-                    \DeclareSseqGroup\cmdarg{command}\marg{argspec}\marg{body}}
-These are similar to |\NewSseqCommand| and |\DeclareSseqCommand| except that the commands defined take an optional square bracket delimited options list, followed by an optional parenthesis delimited |(x,y)| pair and wraps the body of the code in |\begin{scope}[xshift = \meta{xcoord}, yshift = \meta{ycoord}, options]|.
+                    \DeclareSseqGroup\cmdarg{command}\marg{argspec}\marg{body}}%
+These are similar to |\NewSseqCommand| and |\DeclareSseqCommand| except that the
+commands defined take an optional square bracket delimited options list,
+followed by an optional parenthesis delimited |(x,y)| pair and wraps the body of
+the code in%
+\begin{center}
+|\begin{scope}[xshift = \meta{xcoord}, yshift = \meta{ycoord}, options]|.
+\end{center}
 For instance:
 \begin{codeexample}[width = 8cm]
 \DeclareSseqGroup\tower {m} {
@@ -1104,17 +1577,33 @@
 \tower(1,1){2}
 \end{sseqpage}
 \end{codeexample}
-Here we define a command which takes an options list, a coordinate, and a single mandatory argument. The options are applied to all the classes and structlines, the coordinate shifts the origin, and the mandatory argument is the length of the tower.
+Here we define a command which takes an options list, a coordinate, and a single
+mandatory argument. The options are applied to all the classes and structlines,
+the coordinate shifts the origin, and the mandatory argument is the length of
+the tower.
 \end{commandlist}
 
-\begin{command}{\SseqCopyPage\cmdarg{command}\marg{spectral sequence name}\marg{page}}
-This defines \cmdarg{command} to print all of the classes and structlines on page |\meta{page}| of the spectral sequence named |\meta{spectral sequence name}|, throwing out differentials and tikz primitives. The resulting command has syntax as if you had used |\DeclareSseqGroup| with no extra arguments -- that is, it takes an optional options list, which are passed to a scope, and an optional coordinate pair.
+\begin{command}{\SseqCopyPage\cmdarg{command}\marg{spectral sequence name}\marg{page}}%
+This defines \cmdarg{command} to print all of the classes and structlines on
+page |\meta{page}| of the spectral sequence named%
+|\meta{spectral sequence name}|, throwing out differentials and tikz primitives.
+The resulting command has syntax as if you had used |\DeclareSseqGroup| with no
+extra arguments -- that is, it takes an optional options list, which are passed
+to a scope, and an optional coordinate pair.
 \end{command}
 
 \subsection{Families}
-\spectralsequences\ has a concept of ``class families'' that can be drawn or suppressed as a group, and that can have styling options applied to them as a group.
-\begin{command}{\SseqNewFamily\marg{family name}}
-This makes a new family with name \meta{family name}. The effect of this is to define global options |\meta{family name} style| which apply options to all classes in the family, |draw \meta{family name}| which causes the family to be drawn, and |no \meta{family name}| which suppresses the family (drawing is the default behavior of course). It also defines an option |\meta{family name}| which puts a feature into the family -- so it can be used as an option to any of the normal commands like |\class|, |\d|, |\structline|, etc and to a scope.
+\spectralsequences\ has a concept of ``class families'' that can be drawn or
+suppressed as a group, and that can have styling options applied to them as a
+group.
+\begin{command}{\SseqNewFamily\marg{family name}}%
+This makes a new family with name \meta{family name}. The effect of this is to
+define global options |\meta{family name} style| which apply options to all
+classes in the family, |draw \meta{family name}| which causes the family to be
+drawn, and |no \meta{family name}| which suppresses the family (drawing is the
+default behavior of course). It also defines an option |\meta{family name}|
+which puts a feature into the family -- so it can be used as an option to any of
+the normal commands like |\class|, |\d|, |\structline|, etc and to a scope.
 
 \codeexample[vbox, from file=imJ]
 \end{command}
@@ -1121,8 +1610,12 @@
 
 
 \subsection{Utilities}
-\begin{command}{\SseqParseInt\cmdarg{macro}\marg{integer expression}}
-Stores the result of evaluating an integer expression into \cmdarg{macro}. An integer expression consists of |+|, |-|, |*|, |/|, parentheses, and macros that expand to more of the same. The exact rules regarding what is a valid expression are pretty much what you would expect. Note that juxtaposition is a syntax error, not multiplication, so |2(1+1)| is invalid, you must say |2*(1+1)|.
+\begin{command}{\SseqParseInt\cmdarg{macro}\marg{integer expression}}%
+Stores the result of evaluating an integer expression into \cmdarg{macro}. An
+integer expression consists of |+|, |-|, |*|, |/|, parentheses, and macros that
+expand to more of the same. The exact rules regarding what is a valid expression
+are pretty much what you would expect. Note that juxtaposition is a syntax
+error, not multiplication, so |2(1+1)| is invalid, you must say |2*(1+1)|.
 \end{command}
 
 \begin{commandlist}{
@@ -1129,8 +1622,9 @@
     \SseqIfEmptyTF\marg{expression}\marg{true code}\marg{false code},
     \SseqIfEmptyT\marg{expression}\marg{true code},
     \SseqIfEmptyF\marg{expression}\marg{false code}
-}
-This tests if an expression is the empty expression. This is mainly useful for giving systematic labels to things.
+}%
+This tests if an expression is the empty expression. This is mainly useful for
+giving systematic labels to things.
 \end{commandlist}
 
 \begin{commandlist}{
@@ -1137,8 +1631,10 @@
     \IfExistsTF\marg{page}\pararg{coordinate}\marg{true code}\marg{false code},
     \IfExistsT\marg{page}\pararg{coordinate}\marg{true code},
     \IfExistsF\marg{page}\pararg{coordinate}\marg{false code}
-}
-Test whether a class of the given description exists. The description can be any valid coordinate, including a named coordinate. If the coordinate is not valid, this will return false.
+}%
+Test whether a class of the given description exists. The description can be any
+valid coordinate, including a named coordinate. If the coordinate is not valid,
+this will return false.
 \end{commandlist}
 
 \begin{commandlist}{
@@ -1145,8 +1641,9 @@
     \IfAliveTF\marg{page}\pararg{coordinate}\marg{true code}\marg{false code},
     \IfAliveT\marg{page}\pararg{coordinate}\marg{true code},
     \IfAliveF\marg{page}\pararg{coordinate}\marg{false code}
-}
-Test whether a class is alive on the given page. If the class doesn't exist, this will return false.
+}%
+Test whether a class is alive on the given page. If the class doesn't exist,
+this will return false.
 \end{commandlist}
 
 \begin{commandlist}{
@@ -1156,8 +1653,9 @@
     \IfInBoundsTF\pararg{coordinate}\marg{true code}\marg{false code},
     \IfInBoundsT\pararg{coordinate}\marg{true code},
     \IfInBoundsF\pararg{coordinate}\marg{false code}
-}
-Test whether a class is in bounds or out of bounds. If no such class exists, returns false.
+}%
+Test whether a class is in bounds or out of bounds. If no such class exists,
+returns false.
 \end{commandlist}
 
 \begin{commandlist}{
@@ -1168,15 +1666,28 @@
     \DrawIfValidDifferentialT\ooptions\meta{page}\pararg{coordinate}\opt{\pararg{target coordinate}}\marg{true code},
     \DrawIfValidDifferentialF\ooptions\meta{page}\pararg{coordinate}\opt{\pararg{target coordinate}}\marg{false code},
     \DrawIfValidDifferential\ooptions\meta{page}\pararg{coordinate}\opt{\pararg{target coordinate}}\marg{false code}
-}
-Test whether a differential is valid. There are many possible reasons for a differential to not be valid -- the source or target class could not exist, the target could not be in the correct grading, etc. If any error would be generated if you supplied the same arguments to |\d|, this tests false. Otherwise, this tests true. The command |\DrawIfValidDifferental| draws the differential if it is valid, whereas |\DrawIfValidDifferentalT| draws the differential and executes the true code if it is valid,
-|\DrawIfValidDifferentalF| draws the differential or executes false code if it isn't valid, etc.
+}%
+Test whether a differential is valid. There are many possible reasons for a
+differential to not be valid -- the source or target class could not exist, the
+target could not be in the correct grading, etc. If any error would be generated
+if you supplied the same arguments to |\d|, this tests false. Otherwise, this
+tests true. The command |\DrawIfValidDifferental| draws the differential if it
+is valid, whereas |\DrawIfValidDifferentalT| draws the differential and executes
+the true code if it is valid, |\DrawIfValidDifferentalF| draws the differential
+or executes false code if it isn't valid, etc.
 \end{commandlist}
 
 
 
 \begin{command}{\SseqNormalizeMonomial}
-This command simplifies a monomial by combining like variables and removing bases that are raised to the 0th power, removing exponents of 1, removing 1's, and replacing the empty monomial with 1. The variables are sorted by first occurrence, use |\SseqNormalizeMonomialSetVariables| to set a different sort order. It outputs its result into |\result|. This command is specifically meant to be used as a value for |class label handler| or |class name handler|. See the example in the documentation for |class label handler| for a realistic example. The exponents must be integers or else it will misbehave.
+This command simplifies a monomial by combining like variables and removing
+bases that are raised to the 0th power, removing exponents of 1, removing 1's,
+and replacing the empty monomial with 1. The variables are sorted by first
+occurrence, use |\SseqNormalizeMonomialSetVariables| to set a different sort
+order. It outputs its result into |\result|. This command is specifically meant
+to be used as a value for |class label handler| or |class name handler|. See the
+example in the documentation for |class label handler| for a realistic example.
+The exponents must be integers or else it will misbehave.
 \begin{codeexample}[]
 \SseqNormalizeMonomial{x^0y^0} $\result$, \quad
 \SseqNormalizeMonomial{x^3yx^{-1}z^0} $\result$, \quad
@@ -1185,7 +1696,10 @@
 \end{command}
 
 \begin{command}{\SseqNormalizeMonomialSetVariables}
-This command takes an undelimited list sets up |\SseqNormalizeMonomial| to sort the variables in the input in the specified order. This is useful for consistency, and particularly important for when you use it to name classes.  For example:
+This command takes an undelimited list sets up |\SseqNormalizeMonomial| to sort
+the variables in the input in the specified order. This is useful for
+consistency, and particularly important for when you use it to name classes.
+For example:
 \begin{codeexample}[]
 % We always want a first, then b, then x_1, then x_2, then x_3
 \SseqNormalizeMonomialSetVariables{abx_1x_2x_3}
@@ -1198,21 +1712,41 @@
 
 
 \begin{command}{\SseqAHSSNameHandler}
-This command expects an argument of the form |\meta{monomial}[\meta{integer expression}]| and defines |\result| to be |m[n]| where |m| is the result of applying |\SseqNormalizeMonomial| to the monomial, and |n| is the result of evaluation the integer expression plus any |yshift| that is present. This is intended for use with in drawing Atiyah Hirzebruch spectral sequences. See |class name handler| for an example of the calculation of $KO^*\mathbb{R}P^8$.
+This command expects an argument of the form%
+|\meta{monomial}[\meta{integer expression}]| and defines |\result| to be |m[n]|
+where |m| is the result of applying |\SseqNormalizeMonomial| to the monomial,
+and |n| is the result of evaluation the integer expression plus any |yshift|
+that is present. This is intended for use with in drawing Atiyah Hirzebruch
+spectral sequences. See |class name handler| for an example of the calculation
+of $KO^*\mathbb{R}\mathrm{P}^8$.
 \end{command}
 
 \subsection{Coordinate parsers and related}
 %    \parsecoordinate and \parsedifferential
-\begin{command}{\parsecoordinate\cmdarg{macro}(\meta{coordinate})}
-This command parses the coordinate and puts the triple |(x,y,n)| into \cmdarg{macro}. It also puts the components of the coordinate into macros, for instance if \cmdarg{macro} is |\coord|, then |\xcoord| will contain the x coordinate, |\ycoord| will contain the y coordinate, and |\ncoord| will contain the index. The coordinate can be anything that would be valid to use in a differential or structure line; this is the macro that is used internally to handle coordinates.
+\begin{command}{\parsecoordinate\cmdarg{macro}(\meta{coordinate})}%
+This command parses the coordinate and puts the triple |(x,y,n)| into
+\cmdarg{macro}. It also puts the components of the coordinate into macros, for
+instance if \cmdarg{macro} is |\coord|, then |\xcoord| will contain the x
+coordinate, |\ycoord| will contain the y coordinate, and |\ncoord| will contain
+the index. The coordinate can be anything that would be valid to use in a
+differential or structure line; this is the macro that is used internally to
+handle coordinates.
 \end{command}
 
-\begin{command}{\getdtarget\cmdarg{macro}\marg{page}\pars{\sourcecoord}}
-Sets \cmdarg{macro} equal to the coordinates of the target position of a length \meta{page} differential starting at \sourcecoord. This helps to make commands that draw fancy differentials.
+\begin{command}{\getdtarget\cmdarg{macro}\marg{page}\pars{\sourcecoord}}%
+Sets \cmdarg{macro} equal to the coordinates of the target position of a length
+\meta{page} differential starting at \sourcecoord. This helps to make commands
+that draw fancy differentials.
 \end{command}
 
-\begin{command}{\parsedifferential\meta{page}(\meta{differential coordinate})\opt{\pararg{differential target}}}
-This has the same weird syntax of |\d|, except that you are required to put braces around the page (if it has multiple digits) and you are required to provide at least one coordinate (you have to say |\parsedifferential{2}(\lastclass)| for instance). This command is similar in effect to saying both |\parsecoordinate\source\meta{source coordinate}| and |\parsecoordinate\target\meta{target coordinate}|, but it handles determination of the target coordinate for you.
+\begin{command}{\parsedifferential\meta{page}(\meta{differential coordinate})\opt{\pararg{differential target}}}%
+This has the same weird syntax of |\d|, except that you are required to put
+braces around the page (if it has multiple digits) and you are required to
+provide at least one coordinate (you have to say
+|\parsedifferential{2}(\lastclass)| for instance). This command is similar in
+effect to saying both |\parsecoordinate\source\meta{source coordinate}| and
+|\parsecoordinate\target\meta{target coordinate}|, but it handles determination
+of the target coordinate for you.
 
 
 For instance, consider the following example, suggested by Catherine Ray:
@@ -1253,16 +1787,24 @@
 \end{codeexample}
 \end{command}
 
-\begin{command}{\nameclass\marg{name}\pararg{coordinate}}
-The |\nameclass| command gives a name to a class. It's similar to saying |\doptions[name = |\meta{name}|]|, but faster. It's also similar to saying |\pushstack|\pararg{coordinate}. Giving temporary names to coordinates that you are going to use repeatedly makes the code easier to read and is faster (though this only matters in very large charts). See |\getdtarget| for an example.
+\begin{command}{\nameclass\marg{name}\pararg{coordinate}}%
+The |\nameclass| command gives a name to a class. It's similar to saying
+|\doptions[name = |\meta{name}|]|, but faster. It's also similar to saying
+|\pushstack|\pararg{coordinate}. Giving temporary names to coordinates that you
+are going to use repeatedly makes the code easier to read and is faster (though
+this only matters in very large charts). See |\getdtarget| for an example.
 \end{command}
 
-\begin{command}{\tagclass\marg{tag}\pararg{coordinate}}
-The |\tagclass| command gives a tag to a class. It's similar to saying |\doptions[tag = |\meta{name}|]|, but faster. See \example{tmfmayss} for a use case for this.
+\begin{command}{\tagclass\marg{tag}\pararg{coordinate}}%
+The |\tagclass| command gives a tag to a class. It's similar to saying
+|\doptions[tag = |\meta{name}|]|, but faster. See \example{tmfmayss} for a use
+case for this.
 \end{command}
 
-\begin{command}{\gettag\cmdarg{macro}\pararg{coordinate}}
-The |\gettag| command finds the most recent tag applied to the coordinate and stores it into |\cmdarg{macro}|. This is useful for connecting groups of nodes. For example, consider the following code, inspired by \example{tmfmayss}.
+\begin{command}{\gettag\cmdarg{macro}\pararg{coordinate}}%
+The |\gettag| command finds the most recent tag applied to the coordinate and
+stores it into |\cmdarg{macro}|. This is useful for connecting groups of nodes.
+For example, consider the following code, inspired by \example{tmfmayss}.
 \begin{codeexample}[width=6cm]
 \DeclareSseqCommand \tower { O{} } {
     \begin{scope}[#1]
@@ -1305,15 +1847,18 @@
 
 
 \subsection{The class stack}
-\label{sec:class stack}
-The class stack is a linked list of the classes in the order that they are produced that \sseqpages\  maintains. I've only recently implemented this feature, so it is more liable to change in the future than other things. Whenever you use the |\class| function, the class you added is pushed onto the stack. Here's an example that demonstrates basic usage:
+\label{sec:class stack}%
+The class stack is a linked list of the classes in the order that they are
+produced that \sseqpages\  maintains. Whenever you use the |\class| or
+|\replaceclass| command, the class you added is pushed onto the stack.
 
-
 The following commands are used to access the stack:
 
-\begin{commandlist}{\lastx\opt{\meta{n}},\lasty\opt{\meta{n}},\lastclass\opt{\meta{n}}}
-The commands |\lastx| and |\lasty| evaluate to the |x| and |y| position, respectively, of the $n$th class on the stack. If $n = 0$ you can leave it off.
-The command |\lastclass| evaluates to the coordinate of the most recent class on the stack. This is useful for writing turtle-style code:
+\begin{commandlist}{\lastx\opt{\meta{n}},\lasty\opt{\meta{n}},\lastclass\opt{\meta{n}}}%
+The commands |\lastx| and |\lasty| evaluate to the |x| and |y| position,
+respectively, of the $n$th class on the stack. If $n = 0$ you can leave it off.
+The command |\lastclass| evaluates to the coordinate of the most recent class on
+the stack. This is useful for writing turtle-style code:
 \begin{codeexample}[width=6cm]
 \DeclareSseqCommand \etaclass {}{
     \class(\lastx+1,\lasty+1)
@@ -1336,7 +1881,10 @@
 \end{sseqpage}
 \end{codeexample}
 
-You can use |\lastx| and |\lasty| in other contexts than in the body of a \sseqpages\ command, most notably inside |\SseqParseInt| (they also go fine inside |\pgfmathparse| if you need it or one of its siblings). For instance, consider the following tower command:
+You can use |\lastx| and |\lasty| in other contexts than in the body of a
+\sseqpages\ command, most notably inside |\SseqParseInt| (they also work
+correctly when used inside of |\pgfmathparse| and its siblings). For instance,
+consider the following tower command:
 \begin{codeexample}[width=6cm]
 \DeclareSseqCommand \tower { } {
     \savestack
@@ -1356,17 +1904,28 @@
 \end{commandlist}
 
 
-\begin{command}{\pushstack\pararg{coordinate}}
-This adds a class to the top of the stack. The coordinate is specified using the same syntax as a coordinate for |\structline| or |\replaceclass|.
+\begin{command}{\pushstack\pararg{coordinate}}%
+This adds a class to the top of the stack. The coordinate is specified using the
+same syntax as a coordinate for |\structline| or |\replaceclass|.
 \end{command}
 
-\begin{commandlist}{\savestack,\restorestack}
-This saves and reverts the stack. Saves nest. Most frequently, you will want to use these at the start and end of a command.
+\begin{commandlist}{\savestack,\restorestack}%
+This saves and reverts the stack. Saves nest. Most frequently, you will want to
+use these at the start and end of a command.
 \end{commandlist}
 
 
-\section{Styles}
-The \sseqpages\  package has a large number of styles which control the appearance of specific components (e.g., classes, differentials, or structure lines) of a spectral sequence. Each style has two corresponding keys: |classes| and |change classes|.  Saying |classes = |\marg{keys} adds the keys to the list of options used to style every future class, whereas |change classes = |\marg{keys} only makes sense in a \sseqpageenv\  environment, and temporarily overwrites the list of options. Note that |change classes| only applies to classes that existed before the current page, and that even with the |keep changes| option, the |change classes| options are local to the current page. Compare:
+\section{Styles}%
+The \sseqpages\  package has a large number of styles which control the
+appearance of specific components (e.g., classes, differentials, or structure
+lines) of a spectral sequence. Each style has two corresponding keys: |classes|
+and |change classes|.  Saying |classes = |\marg{keys} adds the keys to the list
+of options used to style every future class, whereas%
+|change classes = |\marg{keys} only makes sense in a \sseqpageenv\  environment,
+and temporarily overwrites the list of options. Note that |change classes| only
+applies to classes that existed before the current page, and that even with the
+|keep changes| option, the |change classes| options are local to the current
+page. Compare:
 \begin{codeexample}[width = 8cm]
 \begin{sseqdata}[ name = style example ]
 \class(0,0)\class(1,1)
@@ -1384,9 +1943,19 @@
 \end{sseqpage}
 \end{codeexample}
 
-You can modify these styles outside of a spectral sequence or inside it using |\sseqset|, you can modify them as options to the \sseqdataenv\  and \sseqpageenv\  environments, or you can modify them as arguments to the \scopeenv\  environment.
+You can modify these styles outside of a spectral sequence or inside it using
+|\sseqset|, you can modify them as options to the \sseqdataenv\  and
+\sseqpageenv\  environments, or you can modify them as arguments to the
+\scopeenv\  environment.
 
-In cases where the same drawing feature is affected by multiple of these styles, the more specific style takes precedence. For instance, for a class that is the source or target of a differential on the current page, the precedence order from lowest to highest goes: |sseq style|, |class style|, |transient cycle style|, |this page cycle style|, and then any options from scopes in the order they appear, and any local options (the options that come right with the class, e.g., |\class[local options](x,y)|). If you don't want the options to your scopes to override more specific styles, use |sseq|:
+In cases where the same drawing feature is affected by multiple of these styles,
+the more specific style takes precedence. For instance, for a class that is the
+source or target of a differential on the current page, the precedence order
+from lowest to highest goes: |sseq style|, |class style|,%
+|transient cycle style|, |this page cycle style|, and then any options from
+scopes in the order they appear, and any local options (the options that come
+right with the class, e.g., |\class[local options](x,y)|). If you don't want the
+options to your scopes to override more specific styles, use |sseq|:
 \begin{codeexample}[width = 7cm]
 \begin{sseqpage}[ classes = { blue, fill },
    title style = { align = center, text width = 2.4cm },
@@ -1409,8 +1978,10 @@
 
 
 Throughout, ``class'' and ``cycle'' are synonyms.
-\begin{stylekeylist}{sseqs, change sseqs,sseq,change sseq}
-This passes options to all features in all future spectral sequences in the current scope. Note that for many global options you can set a default directly by saying |\sseqset{key = \marg{value}}| and this is in some cases preferable.
+\begin{stylekeylist}{sseqs, change sseqs,sseq,change sseq}%
+This passes options to all features in all future spectral sequences in the
+current scope. Note that for many global options you can set a default directly
+by saying |\sseqset{key = \marg{value}}| and this is in some cases preferable.
 
 \begin{codeexample}[width = 7cm]
 % Applies to both of the following sseqs:
@@ -1443,8 +2014,16 @@
 \end{stylekeylist}
 
 
-\begin{stylekeylist}{permanent classes, permanent cycles, change permanent classes, change permanent cycles}
-These options change the appearance of all permanent cycles (e.g., those classes which never support or are hit by a differential). For instance, we can circle the permanent cycles automatically. In the following example, note that because |permanent cycles| is more specific than |classes|, the |permanent cycles = {draw}| command takes precedence over the |classes = {draw = none}| command and the permanent cycle nodes are drawn.
+\begin{stylekeylist}{%
+    permanent classes, permanent cycles,%
+    change permanent classes, change permanent cycles%
+}%
+These options change the appearance of all permanent cycles (e.g., those classes
+which never support or are hit by a differential). For instance, we can circle
+the permanent cycles automatically. In the following example, note that because
+|permanent cycles| is more specific than |classes|, the%
+|permanent cycles = {draw}| command takes precedence over the%
+|classes = {draw = none}| command and the permanent cycle nodes are drawn.
 \begin{codeexample}[width = 6.5cm]
 \begin{sseqpage}[ cohomological Serre grading,
                   classes = { draw = none },
@@ -1457,8 +2036,13 @@
 \end{codeexample}
 \end{stylekeylist}
 
-\begin{stylekeylist}{transient classes, transient cycles,change transient classes,change transient cycles}
-These options change the appearance of all transient cycles (e.g., those classes which eventually support or are hit by a differential). Again, this takes precedence over the |classes| option.
+\begin{stylekeylist}{
+    transient classes, transient cycles,
+    change transient classes,change transient cycles
+}%
+These options change the appearance of all transient cycles (e.g., those classes
+which eventually support or are hit by a differential). Again, this takes
+precedence over the |classes| option.
 \begin{codeexample}[width = 6.5cm]
 \begin{sseqpage}[ cohomological Serre grading,
                   classes = { draw = none },
@@ -1471,8 +2055,14 @@
 \end{codeexample}
 \end{stylekeylist}
 
-\begin{stylekeylist}{this page classes, this page cycles, change this page classes,change this page cycles}
-These options change the appearance of all cycles which support or are hit by a differential on this page. Any class that is hit on the current page is also a transient cycle, and so |this page classes| takes precedence over |transient cycles|.
+\begin{stylekeylist}{%
+    this page classes, this page cycles,%
+    change this page classes,change this page cycles%
+}%
+These options change the appearance of all cycles which support or are hit by a
+differential on this page. Any class that is hit on the current page is also a
+transient cycle, and so |this page classes| takes precedence over%
+|transient cycles|.
 \begin{codeexample}[width = 6cm]
 \begin{sseqdata}[ name = this page cycles example, Adams grading,
                   transient cycles = { red, fill }, this page cycles = { blue } ]
@@ -1486,12 +2076,17 @@
 \end{codeexample}
 \end{stylekeylist}
 
-\begin{stylekeylist}{edges,differentials,struct lines, change edges, change differentials, change struct lines}
-The |edges| key applies to both differentials and structure lines. The |differentials| and |struct lines| keys both take precedence over |edges|.
+\begin{stylekeylist}{
+    edges,differentials,struct lines,
+    change edges, change differentials, change struct lines
+}%
+The |edges| key applies to both differentials and structure lines. The
+|differentials| and |struct lines| keys both take precedence over |edges|.
 \end{stylekeylist}
 
-\begin{stylekeylist}{this page struct lines, change this page struct lines}
-This style applies to structure lines whose source or target is hit on the current page. It takes precedence over |struct lines|.
+\begin{stylekeylist}{this page struct lines, change this page struct lines}%
+This style applies to structure lines whose source or target is hit on the
+current page. It takes precedence over |struct lines|.
 \end{stylekeylist}
 
 \begin{stylekeylist}{tikz primitives,change tikz primitives}
@@ -1499,13 +2094,17 @@
 \end{stylekeylist}
 
 
-\begin{stylekeylist}{labels,change labels}
-This style applies to labels on classes, differentials, and structure lines. All the more specific label styles take precedence over it.
+\begin{stylekeylist}{labels,change labels}%
+This style applies to labels on classes, differentials, and structure lines. All
+the more specific label styles take precedence over it.
 \end{stylekeylist}
 
-\begin{stylekeylist}{class labels,inner class labels,outer class labels,
-                change class labels,change inner class labels,change outer class labels}
-Inner class labels specifically applies to class labels that are inside the node, outer class labels specifically applies to ones outside it:
+\begin{stylekeylist}{
+    class labels,inner class labels,outer class labels,
+    change class labels,change inner class labels,change outer class labels
+}%
+Inner class labels specifically applies to class labels that are inside the
+node, outer class labels specifically applies to ones outside it:
 \begin{codeexample}[]
 \begin{sseqpage}[ no axes, classes = { inner sep = 1pt },
     label distance = 2pt,
@@ -1517,17 +2116,22 @@
 \end{codeexample}
 \end{stylekeylist}
 
-\begin{stylekeylist}{edge labels,differential labels,struct line labels,
-                change edge labels,change differential labels,change struct line labels}
+\begin{stylekeylist}{
+    edge labels,differential labels,struct line labels,
+    change edge labels,change differential labels,change struct line labels
+}%
 
 \end{stylekeylist}
 
 
 \subsection{Style-like options}
-The options are not styles, but can be modified in the same set of places (namely, anywhere):
+The options are not styles, but can be modified in the same set of places
+(namely, anywhere):
 
-\begin{keylist}{label distance = \meta{dimension}}
-This sets the default distance from a class to an outer label. There are also variants like |above label distance| corresponding to |above|, |below|, |left|, |right|, |above left|, |above right|, |below left|, and |below right|.
+\begin{keylist}{label distance = \meta{dimension}}%
+This sets the default distance from a class to an outer label. There are also
+variants like |above label distance| corresponding to |above|, |below|, |left|,
+|right|, |above left|, |above right|, |below left|, and |below right|.
 \begin{codeexample}[width = 6cm]
 \begin{sseqpage}[ label distance = 0.3em,
                   right label distance = 0em,
@@ -1542,10 +2146,14 @@
 
 \begin{keylist}{run off = \meta{start tip}--\meta{end tip},
     run off struct lines = \meta{start tip}--\meta{end tip}  (initially {...--...}),
-    run off differentials = \meta{start tip}--\meta{end tip} (initially {...--...})}
-Change the default behavior of run off edges for either all edges, just structure lines, or just differentials respectively. Local arrowhead options override this.
+    run off differentials = \meta{start tip}--\meta{end tip} (initially {...--...})}%
+Change the default behavior of run off edges for either all edges, just
+structure lines, or just differentials respectively. Local arrowhead options
+override this.
 
-If an edge runs off the edge of the clipping, \sseqpages\ automatically add an arrowhead to indicate that the edge continues. This option controls which arrow head is added if the start or end of an edge runs off the page.
+If an edge runs off the edge of the clipping, \sseqpages\ automatically add an
+arrowhead to indicate that the edge continues. This option controls which arrow
+head is added if the start or end of an edge runs off the page.
 \begin{codeexample}[width = 6cm]
 \begin{sseqpage}[ x range = {0}{2}, y range = {0}{2},
                   draw orphan edges, run off = >-stealth ]
@@ -1559,12 +2167,22 @@
 \end{keylist}
 
 \begin{key}{class label handler = \meta{function}}
-\declarecustomhandler{class label handler}{\codehandler}
-The value of |class label handler| is a function that is applied to all labels before displaying them. It should put its output into |\result|.
-This is intended to help with code reusability. Because these handlers may crash or have annoying side-effects on some input, you may want to toggle the value of this command on and off. To turn this off for the rest of the current spectral sequence you can say |\sseqset{class label handler = {}}|. You can also use the |class label handler| key in a \scopeenv.
+\declarecustomhandler{class label handler}{\codehandler}%
+The value of |class label handler| is a function that is applied to all labels
+before displaying them. It should put its output into |\result|. This is
+intended to help with code reusability. Because these handlers may crash or have
+annoying side-effects on some input, you may want to toggle the value of this
+command on and off. To turn this off for the rest of the current spectral
+sequence you can say |\sseqset{class label handler = {}}|. You can also use the
+|class label handler| key in a \scopeenv.
 
-The main function \sseqpages\ provides for use here is |\SseqNormalizeMonomial{#1}|. This makes it convenient to translate expressions with polynomial labels. You can write your own handlers if your \TeX\ programming skills are sufficient. Let me know if there are any other functions that you want here, and if you implement them yourself, please send me your implementation.
-Here is an example of a function that evaluates an arithmetic expression:
+The main function \sseqpages\ provides for use here is
+|\SseqNormalizeMonomial{#1}|. This makes it convenient to translate expressions
+with polynomial labels. You can write your own handlers if your \TeX\
+programming skills are sufficient. Let me know if there are any other functions
+that you want here, and if you implement them yourself, please send me your
+implementation. Here is an example of a function that evaluates an arithmetic
+expression:
 \begin{codeexample}[width=6cm]
 \begin{sseqpage}[
     class label handler = { \SseqParseInt\result{#1} }
@@ -1591,7 +2209,12 @@
 \end{sseqpage}
 \end{codeexample}
 
-Here is another example which demonstrates a useful idiom for drawing Serre spectral sequences. For a more complete example, see \example{KF3n}. Note the use of braces in |{Sq^1\iota_2}|. Without braces, |\SseqNormalizeMonomial| will simplify |Sq^1xSq^2x| into $S^2q^3x^2$, which is obviously undesirable, so the correct way to input this is |{Sq^1x}{Sq^2x}|. Unfortunately, |\foreach| strips a pair of braces from its arguments, so you need to put two pairs of braces.
+Here is another example which demonstrates a useful idiom for drawing Serre
+spectral sequences. For a more complete example, see \example{KF3n}. Note the
+use of braces in |{Sq^1\iota_2}|. Without braces, |\SseqNormalizeMonomial| will
+simplify |Sq^1xSq^2x| into $S^2q^3x^2$, which is obviously undesirable, so the
+correct way to input this is |{Sq^1x}{Sq^2x}|. Unfortunately, |\foreach| strips
+a pair of braces from its arguments, so you need to put two pairs of braces.
 %\pgfmanualpdflabel{normalizemonomialex-labels}
 \begin{codeexample}[width=8cm]
 \begin{sseqpage}[
@@ -1612,9 +2235,15 @@
 
 
 \begin{key}{class name handler = \meta{function}}
-\declarecustomhandler{class name handler}{\codehandler}
-The value of |class name handler| is a function that is applied to all names before using them. It should put its output into |\result|.
-The main functions intended for use here are |\SseqAHSSNameHandler| and |\SseqNormalizeMonomial|, though you can make your own. This is applied both when you name the class, as in \codeverb|\class[name=a](\meta{coordinate})| and when you refer to a class by name, as in |\structline(a)(b)|. One advantage if you are using |\SseqNormalizeMonomial| is that you can ensure that |xy| and |yx| refer to the same class:
+\declarecustomhandler{class name handler}{\codehandler}%
+The value of |class name handler| is a function that is applied to all names
+before using them. It should put its output into |\result|. The main functions
+intended for use here are |\SseqAHSSNameHandler| and |\SseqNormalizeMonomial|,
+though you can make your own. This is applied both when you name the class, as
+in \codeverb|\class[name=a](\meta{coordinate})| and when you refer to a class by
+name, as in |\structline(a)(b)|. One advantage if you are using
+|\SseqNormalizeMonomial| is that you can ensure that |xy| and |yx| refer to the
+same class:
 \begin{codeexample}[]
 \SseqNormalizeMonomialSetVariables{xy}
 \begin{sseqpage}[ class name handler = \SseqNormalizeMonomial,
@@ -1625,7 +2254,8 @@
 \structline(yx)(yyx)
 \end{sseqpage}
 \end{codeexample}
-The next page is an example drawing the Atiyah Hirzebruch spectral sequence computing $KO^*\mathbb{R}P^{8}$.
+The next page is an example drawing the Atiyah Hirzebruch spectral sequence
+computing $KO^*\mathbb{R}P^{8}$.
 % Have to load from file so that \afterpage doesn't cause trouble with verbatim reading.
 \afterpage{%
     An AHSS using \scantokens{|class name handler = \SseqAHSSNameHandler|:}
@@ -1635,29 +2265,79 @@
 }
 \end{key}
 
-\begin{keylist}{class name prefix = \meta{prefix}, class name postfix = \meta{postfix}}
-These keys add respectively a prefix or a postfix to all names of all classes in the scope. This is applied both when you name the class, as in \codeverb|\class[name=a](\meta{coordinate})| and when you refer to a class by name, as in |\structline(a)(b)|.
-The prefix and postfix are added to the command before the |class name handler| is applied, so if you say |name=\meta{the name}| then the name actually given to the class is the value of |\result| after saying |\classnamehander{\meta{name prefix}\meta{the name}\meta{name postfix}}|
+\begin{keylist}{class name prefix = \meta{prefix}, class name postfix = \meta{postfix}}%
+These keys add respectively a prefix or a postfix to all names of all classes in
+the scope. This is applied both when you name the class, as in
+\codeverb|\class[name=a](\meta{coordinate})| and when you refer to a class by
+name, as in |\structline(a)(b)|. The prefix and postfix are added to the command
+before the |class name handler| is applied, so if you say |name=\meta{the name}|
+then the name actually given to the class is the value of |\result| after saying
+\begin{center}
+|\classnamehander{\meta{name prefix}\meta{the name}\meta{name postfix}}|
+\end{center}
 \end{keylist}
 
 \section{Global Options}
-These options can only be set at the beginning of a \sseqdataenv\  or \sseqpageenv\  environment. When it makes sense, you can also set a default value using |\sseqset|. Generally, these options either modify the plot style or the logic for the spectral sequence.
-\begin{key}{name = \meta{sseq name}}
-This option must be used with the \sseqdataenv\  environment where it indicates the name of the spectral sequence, which will be used with the \sseqpageenv\  environment or |\printpage| command to draw the spectral sequence. The name used in a \sseqdataenv\  environment must be new unless the environment is used with the |update existing| key in which case the \sseqdataenv\  environment will add to the existing spectral sequence. It is optional when used with \sseqpageenv\ , and if included the name given must be the name of an existing spectral sequence.
+These options can only be set at the beginning of a \sseqdataenv\  or
+\sseqpageenv\  environment. When it makes sense, you can also set a default
+value using |\sseqset|. Generally, these options either modify the plot style or
+the logic for the spectral sequence.
+\begin{key}{name = \meta{sseq name}}%
+This option must be used with the \sseqdataenv\  environment where it indicates
+the name of the spectral sequence, which will be used with the \sseqpageenv\
+environment or |\printpage| command to draw the spectral sequence. The name used
+in a \sseqdataenv\  environment must be new unless the environment is used with
+the |update existing| key in which case the \sseqdataenv\  environment will add
+to the existing spectral sequence. It is optional when used with \sseqpageenv\ ,
+and if included the name given must be the name of an existing spectral
+sequence.
 \end{key}
 
-\begin{key}{page = \meta{page number}\opt{--\meta{page max} (initially 0)}}
-This key is for \sseqpageenv\  and |\printpage|. It specifies which page of the spectral sequence is to be printed. On page r, all |\class|es that are not hit by differentials on pages less than r will be printed, as well as all |\structline|s whose source and target classes are both printed on page r, and all differentials of length exactly r. The special value |page = 0| prints all classes, differentials, and structure lines.
+\begin{key}{page = \meta{page number}\opt{--\meta{page max} (initially 0)}}%
+This key is for \sseqpageenv\  and |\printpage|. It specifies which page of the
+spectral sequence is to be printed. On page r, all |\class|es that are not hit
+by differentials on pages less than r will be printed, as well as all
+|\structline|s whose source and target classes are both printed on page r, and
+all differentials of length exactly r. The special value |page = 0| prints all
+classes, differentials, and structure lines but no extensions. The special value
+|page=\infty| will draw the infinity page with extensions.
 
-If you use this key with a range, then all differentials in that range of lengths will be drawn. The larger number only changes which differentials are drawn. If you use 0 for the \meta{page max}, then all differentials longer than \meta{page number} will be drawn.
+If you use this key with a range, e.g., |page=2--5|, then all differentials in
+that range of lengths will be drawn, so in the example differentials of length
+greater than or equal to 2 and less than or equal to 5 are drawn. The larger
+number only changes which differentials are drawn, classes and structlines are
+drawn as if the page was the small endpoint of the range. If you use 0 for the
+\meta{page max}, then all differentials longer than \meta{page number} will be
+drawn, e.g., |page=5---0| draws all differentials of length at least 5, but no
+extensions. Using |page=5---\infty| will draw all differentials of length at
+least 5 and also all extensions whose endpoint classes are in the
+final generation on page 5.
 \end{key}
 
-\begin{keylist}{degree = \marg{x degree}\marg{y degree},cohomological Serre grading, homological Serre grading, Adams grading}
-Specifies the degree of differentials. The \meta{x degree} and \meta{y degree} should both be mathematical expressions in one variable |#1| that evaluate to integers on any input. They specify the $\mathtt{x}$ and $\mathtt{y}$ displacement of a page $\mathtt{\#1}$ differential. In practice, they will be linear expressions with |#1| coefficient 1, -1, or 0.
+\begin{keylist}{%
+    degree = \marg{x degree}\marg{y degree},%
+    cohomological Serre grading,%
+    homological Serre grading,%
+    Adams grading%
+}%
+Specifies the degree of differentials. The \meta{x degree} and \meta{y degree}
+should both be mathematical expressions in one variable |#1| that evaluate to
+integers on any input. They specify the $\mathtt{x}$ and $\mathtt{y}$
+displacement of a page $\mathtt{\#1}$ differential. In practice, they will be
+linear expressions with |#1| coefficient 1, -1, or 0.
 
-The |degree| option must be given before placing any differentials. It can be specified at the beginning of the \sseqdataenv\  environment, at the beginning of the \sseqpageenv\  environment if it is being used as a standalone page, or as a default by saying |\sseqset{degree = \marg{x degree}\marg{y degree}}| or |\sseqset{Adams grading}| outside of the \sseqdataenv\  and \sseqpages\  environments.
+The |degree| option must be given before placing any differentials. It can be
+specified at the beginning of the \sseqdataenv\  environment, at the beginning
+of the \sseqpageenv\  environment if it is being used as a standalone page, or
+as a default by saying |\sseqset{degree = \marg{x degree}\marg{y degree}}| or
+|\sseqset{Adams grading}| outside of the \sseqdataenv\  and \sseqpages\
+environments.
 
-You can make a named grading convention by saying \codeverb|\sseqset{my grading/.sseq grading = \marg{x degree}\marg{y degree}}|. Then later passing |my grading| to a spectral sequence is equivalent to saying |degree = \marg{x degree}\marg{y degree}|. The following grading conventions exist by default:
+You can make a named grading convention by saying \codeverb|\sseqset{my
+grading/.sseq grading = \marg{x degree}\marg{y degree}}|. Then later passing%
+|my grading| to a spectral sequence is equivalent to saying%
+|degree = \marg{x degree}\marg{y degree}|. The following grading conventions
+exist by default:
 \begin{codeexample}[width = 6cm]
 % equivalent to degree = {#1}{1-#1}:
 \begin{sseqpage}[ cohomological Serre grading ]
@@ -1685,7 +2365,9 @@
 \end{keylist}
 
 \begin{keylist}{strict degree, lax degree}
-If the degree is strict, then \LaTeX will throw an error if you try to specify a differential that doesn't have the proper grading. The degree is strict by default.
+If the degree is strict, then \LaTeX will throw an error if you try to specify a
+differential that doesn't have the proper grading. The degree is strict by
+default.
 \begin{codeexample}[code only]
 \begin{sseqdata}[ name = laxdegree, Adams grading ]
 \class(0,2)
@@ -1706,13 +2388,19 @@
 \end{keylist}
 
 \begin{key}{update existing}
-This key is only for the \sseqdataenv\  environment. It specifies that the current \sseqdataenv\  environment is adding data to an existing spectral sequence. If you don't pass this key, then giving a \sseqdataenv\  environment the same |name| as a different \sseqdataenv\  environment will cause an error. This is intended to help you avoid accidentally reusing the same name.
+This key is only for the \sseqdataenv\  environment. It specifies that the
+current \sseqdataenv\  environment is adding data to an existing spectral
+sequence. If you don't pass this key, then giving a \sseqdataenv\  environment
+the same |name| as a different \sseqdataenv\  environment will cause an error.
+This is intended to help you avoid accidentally reusing the same name.
 \end{key}
 
 
-\begin{key}{keep changes =\meta{boolean} (default true)(initially false)}
-This option is only for the \sseqpageenv\  environment, and only works when a |name| is provided.
-This option specifies that all of the commands in the current \sseqpageenv\  environment should be carried forward to future pages of the same named spectral sequence. For example:
+\begin{key}{keep changes =\meta{boolean} (default true)(initially false)}%
+This option is only for the \sseqpageenv\  environment, and only works when a
+|name| is provided. This option specifies that all of the commands in the
+current \sseqpageenv\  environment should be carried forward to future pages of
+the same named spectral sequence. For example:
 \begin{codeexample}[]
 \begin{sseqdata}[ name = keep changes example, Adams grading, y range = {0}{3} ]
 \class(0,0)
@@ -1737,20 +2425,31 @@
 
 \printpage[ name = keep changes example, page = 3 ]
 \end{codeexample}
-Note that the orange classes and differential do not persist because the |keep changes| option is not set in the first \sseqpageenv\  environment, but the blue classes and differential do, since the |keep changes| option is set in the second \sseqpageenv\  environment.
+Note that the orange classes and differential do not persist because the
+|keep changes| option is not set in the first \sseqpageenv\  environment, but the blue
+classes and differential do, since the |keep changes| option is set in the
+second \sseqpageenv\  environment.
 \end{key}
 
 
 \begin{keylist}{no differentials,draw differentials}
-The option |no differentials| suppresses all of the differentials on the current page, whereas |draw differentials| causes the page appropriate differentials to be drawn. This is useful for explaining how the computation of a spectral sequence goes, or if you want to display one of the edges of the spectral sequence, like in \example{KF3n}.
+The option |no differentials| suppresses all of the differentials on the current
+page, whereas |draw differentials| causes the page appropriate differentials to
+be drawn. This is useful for explaining how the computation of a spectral
+sequence goes, or if you want to display one of the edges of the spectral
+sequence, like in \example{KF3n}.
 \end{keylist}
 
 \begin{keylist}{no struct lines,draw struct lines}
-The option |no struct lines| suppresses all of the structure lines on the current page, whereas the option |draw struct lines| causes the page appropriate structure lines to be drawn.
+The option |no struct lines| suppresses all of the structure lines on the
+current page, whereas the option |draw struct lines| causes the page appropriate
+structure lines to be drawn.
 \end{keylist}
 
 \begin{keylist}{no orphan edges,draw orphan edges}
-An edge is an ``orphan'' if both its source and target lie off the page. By default these are drawn, but with the option |no orphan edges| they are not. If the option |no orphan edges| has been set, |draw orphan edges| undoes it.
+An edge is an ``orphan'' if both its source and target lie off the page. By
+default these are drawn, but with the option |no orphan edges| they are not. If
+the option |no orphan edges| has been set, |draw orphan edges| undoes it.
 \begin{codeexample}[width = 9cm]
 \begin{sseqdata}[
     name = orphan edges example,
@@ -1769,8 +2468,9 @@
 \end{keylist}
 
 
-\begin{key}{class pattern = \meta{class pattern name} (initially standard)}
-This key specifies the arrangement of multiple classes at the same coordinate. The default value is |standard|.
+\begin{key}{class pattern = \meta{class pattern name} (initially standard)}%
+This key specifies the arrangement of multiple classes at the same coordinate.
+The default value is |standard|.
 \begin{codeexample}[width = 5cm]
 \begin{sseqdata}[ name = class pattern example, no axes, ymirror ]
 \class(0,0)
@@ -1786,11 +2486,12 @@
     class pattern = linear, class placement transform = { rotate = 45 } ]
 \end{codeexample}
 
-You can add new class patterns using |\sseqnewclasspattern|:
-\begin{command}{\sseqnewclasspattern\marg{class pattern name}\marg{offsets}}
-Creates a new class pattern. For example, the |linear| class pattern is created using the command:
+You can add new class patterns using |\SseqNewClassPattern|:
+\begin{command}{\SseqNewClassPattern\marg{class pattern name}\marg{offsets}}
+Creates a new class pattern. For example, the |linear| class pattern is created
+using the command:
 \begin{codeexample}[code only]
-\sseqnewclasspattern{linear}{
+\SseqNewClassPattern{linear}{
     (0,0);
     (-0.13,0)(0.13,0);
     (-0.2,0)(0,0)(0.2,0);
@@ -1799,14 +2500,29 @@
     (-0.5,0)(-0.3,0)(-0.1,0)(0.1,0)(0.3,0)(0.5,0);
 }
 \end{codeexample}
-For instance the third row indicates that if there are three classes at the position |(x,y)| they should be printed at |(x-0.2,y)|, |(x,y)|, and |(x+0.2,y)|. You can give as many rows as you like; \sseqpages\  will throw an error if there are more classes in any position than the maximum number that your class pattern can handle -- for instance, the |linear| class pattern can handle up to six classes based on this definition.
+For instance the third row indicates that if there are three classes at the
+position |(x,y)| they should be printed at |(x-0.2,y)|, |(x,y)|, and
+|(x+0.2,y)|. You can give as many rows as you like; \sseqpages\  will throw an
+error if there are more classes in any position than the maximum number that
+your class pattern can handle -- for instance, the |linear| class pattern can
+handle up to six classes based on this definition.
 \end{command}
 \end{key}
 
 
-\begin{keylist}{class placement transform = \marg{transform keys}, add class placement transform = \marg{transform keys} }
-\declareasstyle{class placement transform}\declareasstyle{add class placement transform}
-The option |class placement transform| allows the user to specify a \tikzpkg\  coordinate transform to adjust the relative position of multiple nodes in the same $\mathtt{(x,y)}$ position. The |class placement transform| key overrides the previous value of transformations, the |add class placement transform| just adds the new transformation to the end of the list. This coordinate transform can only involve rotation and scaling, no translation. Specifying a scaling factor helps if the nodes are too large and overlap. In some cases a rotation makes it easier to see which class is the target of a differential.
+\begin{keylist}{%
+    class placement transform = \marg{transform keys},%
+    add class placement transform = \marg{transform keys}%
+}%
+\declareasstyle{class placement transform}\declareasstyle{add class placement transform}%
+The option |class placement transform| allows the user to specify a \tikzpkg\
+coordinate transform to adjust the relative position of multiple nodes in the
+same $\mathtt{(x,y)}$ position. The |class placement transform| key overrides
+the previous value of transformations, the |add class placement transform| just
+adds the new transformation to the end of the list. This coordinate transform
+can only involve rotation and scaling, no translation. Specifying a scaling
+factor helps if the nodes are too large and overlap. In some cases a rotation
+makes it easier to see which class is the target of a differential.
 \begin{codeexample}[width = 5cm]
 \begin{sseqpage}[ class placement transform = { xscale = 1.5 },
                   class pattern = linear,
@@ -1830,7 +2546,8 @@
 \draw[->,red](3,0,1)--(0,0);
 \end{sseqpage}
 \end{codeexample}
-With multiple large class labels, the best option is to arrange the classes vertically:
+With multiple large class labels, the best option is to arrange the classes
+vertically:
 \begin{codeexample}[width = 5.5cm]
 \begin{sseqpage}[ classes = {draw = none }, xscale = 2, yscale=1.55,
     class pattern = linear,
@@ -1854,7 +2571,7 @@
 \end{codeexample}
 \end{keylist}
 
-\begin{key}{math nodes = \meta{boolean} (default true)(initially true)}
+\begin{key}{math nodes = \meta{boolean} (default true)(initially true)}%
 This key instructs \sseqpages\  to put all labels in math mode automatically.
 \end{key}
 
@@ -1861,9 +2578,14 @@
 
 
 \subsection{Global coordinate transformations}
-Of the normal \tikzpkg\ coordinate transformations, only the following can be applied to a \sseqpages\  chart:
-\begin{keylist}{scale = \meta{factor},xscale = \meta{factor}, yscale = \meta{factor}, xmirror, ymirror}
-Scale the chart by \meta{factor}. Under normal circumstances, you can tell \tikzpkg\ to mirror a chart by saying, for instance, |xscale = -1|, but \sseqpages\  needs to be aware that the chart has been mirrored in order to draw the axes correctly. Thus, if you want to mirror a spectral sequence, use the |xmirror| and |ymirror| options as appropriate.
+Of the normal \tikzpkg\ coordinate transformations, only the following can be
+applied to a \sseqpages\  chart:
+\begin{keylist}{scale = \meta{factor},xscale = \meta{factor}, yscale = \meta{factor}, xmirror, ymirror}%
+Scale the chart by \meta{factor}. Under normal circumstances, you can tell
+\tikzpkg\ to mirror a chart by saying, for instance, |xscale = -1|, but
+\sseqpages\  needs to be aware that the chart has been mirrored in order to draw
+the axes correctly. Thus, if you want to mirror a spectral sequence, use the
+|xmirror| and |ymirror| options as appropriate.
 \end{keylist}
 
 \begin{key}{rotate = \meta{angle}}
@@ -1871,10 +2593,32 @@
 \end{key}
 
 \subsection{Plot options and axes style}
-\begin{keylist}{x range = \marg{x min}\marg{x max},y range = \marg{y min}\marg{y max}}
-These options set the x range (respectively y range) to be a specific interval. By default, if no range is specified then the range is chosen to fit all the classes. If an x range is specified but no y range, then the y range is chosen to fit all the classes that lie inside the specified x range, and vice versa. The values must be integers -- if you want to extend the x axis a noninteger amount, try using |x axis start extend| or |x axis end extend|.
+\begin{keylist}{x range = \marg{x min}\marg{x max},y range = \marg{y min}\marg{y
+max}} These options set the x range (respectively y range) to be a specific
+interval. By default, if no range is specified then the range is chosen to fit
+all the classes. If an x range is specified but no y range, then the y range is
+chosen to fit all the classes that lie inside the specified x range, and vice
+versa. The values must be integers -- if you want to extend the x axis a
+noninteger amount, try using |x axis start extend| or |x axis end extend|.
 \end{keylist}
 
+\begin{keylist}{range check standard (default), range check sideways, range check off}
+These options control the range checking behavior.
+
+By default \sseqpages\ will try to compute whether the chart fits onto the page
+(without causing overfull boxes). The computation isn't perfectly accurate and
+it assumes that the entire page is available for the chart to use up, so for
+instance if the chart is indented because of |\textindent| or not at the top of
+the page, this might give overly large values. Also, the values computed aren't
+perfectly accurate.
+
+If the range check is not desirable, you can use |range check off|. If the
+diagram is being placed onto the page rotated 90 degrees, then use
+%
+|range check sideways|. Inside of a \env{sideways} environment from the
+\pkg{rotating} package, this is the default.
+\end{keylist}
+
 \begin{keylist}{
     grid = \meta{grid type},
     grid color = \meta{color},
@@ -1881,8 +2625,9 @@
     grid step = \meta{positive integer},
     x grid step = \meta{positive integer},
     y grid step = \meta{positive integer}
-}
-Makes \sseqpages\  draw a grid. The grid types and a significant part of the code that produces them were stolen from the \sseqpkg\ package.
+}%
+Makes \sseqpages\  draw a grid. The grid types and a significant part of the
+code that produces them were stolen from the \sseqpkg\ package.
 \begin{codeexample}[vbox]
 \begin{sseqdata}[ name = grid example, scale = 0.8 ]
 \class(0,0)
@@ -1904,15 +2649,30 @@
 \printpage[ name = grid example, grid = none ]
 }
 \end{codeexample}
-It is possible to make your own grid type by defining the command |\sseq at grid@yourgridname| to draw a grid.
+It is possible to make your own grid type by defining the command
+|\sseq at grid@yourgridname| to draw a grid.
 
-It is a known problem that acrobat reader displays grids very dark and thick. This is caused by the enhance thin lines ``feature'' of Acrobat reader. You can turn it off globally by going into the acrobat reader preferences window and unchecking the ``Enhance thin lines'' checkbox in the ``Rendering'' section. Unfortunately, there is no way to instruct Acrobat Reader to not apply this feature to a particular document. This has apparently been annoying graphic designers for over a decade.
+It is a known problem that acrobat reader displays grids very dark and thick.
+This is caused by the enhance thin lines ``feature'' of Acrobat reader. You can
+turn it off globally by going into the acrobat reader preferences window and
+unchecking the ``Enhance thin lines'' checkbox in the ``Rendering'' section.
+Unfortunately, there is no way to instruct Acrobat Reader to not apply this
+feature to a particular document. This has apparently been annoying graphic
+designers for over a decade.
 
 The grid color option changes the color of the grid; the default value is |gray|.
 The grid step keys change the grid step.
 \end{keylist}
 
-\begin{keylist}{title = \meta{text}, title style = \meta{keys}, x label = \meta{text}, y label = \meta{text},x label style = \meta{keys}, y label style = \meta{keys}, label style = \meta{keys}}
+\begin{keylist}{%
+    title = \meta{text},%
+    title style = \meta{keys},%
+    x label = \meta{text},%
+    y label = \meta{text},%
+    x label style = \meta{keys},%
+    y label style = \meta{keys},%
+    label style = \meta{keys}%
+}
 \declareasstyle{title style}
 \declareasstyle{x label style}
 \declareasstyle{y label style}
@@ -1929,17 +2689,29 @@
 \class(2,2)
 \end{sseqpage}
 \end{codeexample}
-Note that if you make multiple versions of the same chart and some of the charts have labels and others don't, they might not align the way you want. An easy solution to this is to use |\path[background] (min x, min y) -- (max x, max y);| where the coordinates are below and to the left, respectively above and to the right, of everything else drawn in any picture. This makes the bounding boxes for all of the pictures the same size, so that they line up even if the exact collection of things drawn changes. See the example at the end of the |background| key for an illustration of this.
+Note that if you make multiple versions of the same chart and some of the charts
+have labels and others don't, they might not align the way you want. An easy
+solution to this is to use |\path[background] (min x, min y) -- (max x, max y);|
+where the coordinates are below and to the left, respectively above and to the
+right, of everything else drawn in any picture. This makes the bounding boxes
+for all of the pictures the same size, so that they line up even if the exact
+collection of things drawn changes. See the example at the end of the
+|background| key for an illustration of this.
 \end{keylist}
 
 \needspace{5\baselineskip}
 \begin{keylist}{no title, draw title, no x label, no y label, no labels, draw x label, draw y label, draw labels}
-Suppress or unsuppress the title, x label, y label, or both x and y labels, respectively.
+Suppress or unsuppress the title, x label, y label, or both x and y labels,
+respectively.
 \end{keylist}
 
 
 \begin{keylist}{no x ticks, no y ticks, no ticks, draw x ticks, draw y ticks, draw ticks}
-Suppress axes ticks (the numbers next to the axes). Only matters if axes are drawn. You can make your own ticks using \tikzpkg\  inside a \scopeenv\  environment with the |background| key. For instance, you might want to label the axes as 0, $n$, $2n$, \ldots You can achieve this as follows: (you can also use |x tick handler|).
+Suppress axes ticks (the numbers next to the axes). Only matters if axes are
+drawn. You can make your own ticks using \tikzpkg\  inside a \scopeenv\
+environment with the |background| key. For instance, you might want to label the
+axes as 0, $n$, $2n$, \ldots You can achieve this as follows: (you can also use
+|x tick handler|).
 \begin{codeexample}[width = 5.7cm]
 \begin{sseqpage}[ no x ticks, x range = {0}{3} ]
 \begin{scope}[ background ]
@@ -1961,8 +2733,10 @@
 Sets the interval between labels.
 \end{keylist}
 
-\begin{keylist}{x tick offset = \meta{integer} (initially 0),y tick offset = \meta{integer} (initially 0),tick offset = \meta{integer} (initially 0)}
-Sets the label offset -- by default the ticks will always be the set of numbers that are 0 mod \meta{tick step}. Change it so that the ticks are the set of numbers that are \meta{tick offset} mod \meta{tick step}.
+\begin{keylist}{x tick offset = \meta{integer} (initially 0),y tick offset = \meta{integer} (initially 0),tick offset = \meta{integer} (initially 0)}%
+Sets the label offset -- by default the ticks will always be the set of numbers
+that are 0 mod \meta{tick step}. Change it so that the ticks are the set of
+numbers that are \meta{tick offset} mod \meta{tick step}.
 \end{keylist}
 
 \begin{keylist}{
@@ -1972,8 +2746,9 @@
     x minor tick step = \meta{nonnegative integer} (initially 0),
     y minor tick step = \meta{nonnegative integer} (initially 0),
     minor tick step = \meta{nonnegative integer}%
-}
-If these are nonzero, they control the placement of tick marks on the axes. The value 0 prevents tick marks from being drawn. Uses |x tick offset| as an offset.
+}%
+If these are nonzero, they control the placement of tick marks on the axes. The
+value 0 prevents tick marks from being drawn. Uses |x tick offset| as an offset.
 \begin{codeexample}[width=7cm]
 \begin{sseqpage}[
     tick step = 5,
@@ -1997,11 +2772,17 @@
 \end{codeexample}
 \end{stylekeylist}
 
-\begin{keylist}{x tick handler = \meta{function} (initially \#1), y tick handler = \meta{function} (initially \#1), tick handler = \meta{function} (initially \#1)}
+\begin{keylist}{%
+    x tick handler = \meta{function} (initially \#1),%
+    y tick handler = \meta{function} (initially \#1),%
+    tick handler = \meta{function} (initially \#1)%
+}
 \declarecustomhandler{x tick handler}{\codehandler}
 \declarecustomhandler{y tick handler}{\codehandler}
 \declarecustomhandler{tick handler}{\codehandler}
-The value for |x tick handler| should be a function that takes in the current $\mathtt{x}$ value and outputs the appropriate tick. Correspondingly with |y tick handler|. The |tick handler| key sets both.
+The value for |x tick handler| should be a function that takes in the current
+$\mathtt{x}$ value and outputs the appropriate tick. Correspondingly with%
+|y tick handler|. The |tick handler| key sets both.
 \begin{codeexample}[width = 7cm]
 \begin{sseqpage}[ x range = {0}{4}, yscale = 1.78,
     x tick handler = {
@@ -2024,8 +2805,21 @@
 \end{keylist}
 
 \subsection{Layout}
-\begin{keylist}{x axis type = \meta{type} (initially border), y axis type = \meta{type} (initially border),axes type = \meta{type} (initially border), no x axis, no y axis, no axes}
-The \meta{type} is either |border|, |center|, |frame|, or |none|. |no axes| is a shorthand for |axes type=none|. The |border| type is the default and puts the axes on the bottom and left of the picture. The |center| type by default places the axes to pass through $(0,0)$; this can be modified using the |x axis origin| and |y axis origin| keys. See \example{KRAHSS} and \example{KUHFPSS} for examples where this is used. The |frame| type draws a frame around the entire chart:
+\begin{keylist}{%
+    x axis type = \meta{type} (initially border),%
+    y axis type = \meta{type} (initially border),%
+    axes type = \meta{type} (initially border),%
+    no x axis,%
+    no y axis,%
+    no axes%
+}%
+The \meta{type} is either |border|, |center|, |frame|, or |none|. |no axes| is a
+shorthand for |axes type=none|. The |border| type is the default and puts the
+axes on the bottom and left of the picture. The |center| type by default places
+the axes to pass through $(0,0)$; this can be modified using the |x axis origin|
+and |y axis origin| keys. See \example{KRAHSS} and \example{KUHFPSS} for
+examples where this is used. The |frame| type draws a frame around the entire
+chart:
 
 \begin{codeexample}[width=6cm]
 \begin{sseqpage}[ axes type = frame ]
@@ -2036,31 +2830,50 @@
 \end{keylist}
 
 \parskip=0pt
-\begin{keylist}{x axis origin = \meta{x value} (initially 0), y axis origin = \meta{y value} (initially 0)}
-If you use |axes type = center|, these keys change the position of the axes. Otherwise, they are ignored.
+\begin{keylist}{%
+    x axis origin = \meta{x value} (initially 0),%
+    y axis origin = \meta{y value} (initially 0)%
+}%
+If you use |axes type = center|, these keys change the position of the axes.
+Otherwise, they are ignored.
 \end{keylist}
 %
-\begin{keylist}{x axis gap = \meta{dimension} (initially 0.5cm),y axis gap = \meta{dimension} (initially 0.5cm), axes gap = \meta{dimension} (initially 0.5cm)}
+\begin{keylist}{%
+    x axis gap = \meta{dimension} (initially 0.5cm),%
+    y axis gap = \meta{dimension} (initially 0.5cm),%
+    axes gap = \meta{dimension} (initially 0.5cm)%
+}%
 %
 \end{keylist}
 %
-\begin{keylist}{x tick gap = \meta{dimension} (initially 0.5cm),y tick gap = \meta{dimension} (initially 0.5cm)}
+\begin{keylist}{%
+    x tick gap = \meta{dimension} (initially 0.5cm),%
+    y tick gap = \meta{dimension} (initially 0.5cm)%
+}
 %
 \end{keylist}
 %
-\begin{keylist}{
-    x axis extend start = \meta{dimension} (initially 0.5cm), y axis extend start = \meta{dimension} (initially 0.5cm),
-    x axis extend end = \meta{dimension} (initially 0.5cm), y axis extend end = \meta{dimension} (initially 0.5cm),
-    x axis tail = \meta{dimension} (initially 0.9cm), y axis tail = \meta{dimension} (initially 0.9cm)%
+\begin{keylist}{%
+    x axis extend start = \meta{dimension} (initially 0.5cm),%
+    y axis extend start = \meta{dimension} (initially 0.5cm),%
+    x axis extend end = \meta{dimension} (initially 0.5cm),%
+    y axis extend end = \meta{dimension} (initially 0.5cm),%
+    x axis tail = \meta{dimension} (initially 0.9cm),%
+    y axis tail = \meta{dimension} (initially 0.9cm)%
 }
 \end{keylist}
 %
-\begin{keylist}{x axis clip padding = \meta{dimension} (initially 0.1cm), y axis clip padding = \meta{dimension} (initially 0.1cm)}
+\begin{keylist}{%
+    x axis clip padding = \meta{dimension} (initially 0.1cm),%
+    y axis clip padding = \meta{dimension} (initially 0.1cm)%
+}
 \end{keylist}
 %
-\begin{keylist}{
-    right clip padding = \meta{dimension} (initially 0.1cm), left clip padding = \meta{dimension} (initially 0.1cm),
-     top clip padding = \meta{dimension} (initially 0.1cm), bottom clip padding = \meta{dimension} (initially 0.1cm)%
+\begin{keylist}{%
+    right clip padding = \meta{dimension} (initially 0.1cm),%
+    left clip padding = \meta{dimension} (initially 0.1cm),%
+    top clip padding = \meta{dimension} (initially 0.1cm),%
+    bottom clip padding = \meta{dimension} (initially 0.1cm)%
 }
 \end{keylist}
 
@@ -2072,16 +2885,27 @@
 
 
 \parskip=10pt
-\begin{key}{custom clip = \meta{clip path}}
-Give a custom clipping. The clipping specified must be in the form of a valid \tikzpkg\ path, for instance |\clip (0,0) rectangle (10,10);|. This clipping is also applied to any grid and is used to draw ellipses on appropriate differentials or structure lines that go out of bounds and to determine whether a differential or structure line is an ``orphan''. It is not applied to any background elements, which is important because these are often used for axes labels and such that should lie outside of the clipping region. Weird things can happen with out of range edges if you provide an oddly shaped path.
+\begin{key}{custom clip = \meta{clip path}}%
+Give a custom clipping. The clipping specified must be in the form of a valid
+\tikzpkg\ path, for instance |\clip (0,0) rectangle (10,10);|. This clipping is
+also applied to any grid and is used to draw ellipses on appropriate
+differentials or structure lines that go out of bounds and to determine whether
+a differential or structure line is an ``orphan''. It is not applied to any
+background elements, which is important because these are often used for axes
+labels and such that should lie outside of the clipping region. Weird things can
+happen with out of range edges if you provide an oddly shaped path.
 \end{key}
 
-\begin{key}{clip = \meta{boolean} (default true)(initially true)}
-If this is false the spectral sequence chart won't be clipped. I'm not really sure why you would want that, but there might be some use case. Setting this to be false is not fully supported, and it's possible that weird things will happen with some of the edges that go out of range.
+\begin{key}{clip = \meta{boolean} (default true)(initially true)}%
+If this is false the spectral sequence chart won't be clipped. I'm not really
+sure why you would want that, but there might be some use case. Setting this to
+be false is not fully supported, and it's possible that weird things will happen
+with some of the edges that go out of range.
 \end{key}
 
 
-\begin{key}{rotate labels = \meta{boolean} (default true)(initially false)}
-If you use |rotate = 90| but also want the labels rotated (so that the whole chart is sideways) use this key.
+\begin{key}{rotate labels = \meta{boolean} (default true)(initially false)}%
+If you use |rotate = 90| but also want the labels rotated (so that the whole
+chart is sideways) use this key.
 \end{key}
 \end{document}

Modified: trunk/Master/texmf-dist/doc/latex/spectralsequences/manual/spectralsequencesmanualpreamble.tex
===================================================================
--- trunk/Master/texmf-dist/doc/latex/spectralsequences/manual/spectralsequencesmanualpreamble.tex	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/doc/latex/spectralsequences/manual/spectralsequencesmanualpreamble.tex	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2 2017-09-16 2017-09-16
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% File: spectralsequencesmanualpreamble.tex

Deleted: trunk/Master/texmf-dist/doc/latex/spectralsequences/manual/sseqmanualtest.tex
===================================================================
Modified: trunk/Master/texmf-dist/tex/latex/spectralsequences/spectralsequences.sty
===================================================================
--- trunk/Master/texmf-dist/tex/latex/spectralsequences/spectralsequences.sty	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/tex/latex/spectralsequences/spectralsequences.sty	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% A package for drawing spectral sequences
@@ -23,7 +23,7 @@
 
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{spectralsequences}[2019/02/18 v1.2.2]
+\ProvidesPackage{spectralsequences}[2021/07/18 v1.3.0]
 
 \RequirePackage{tikz}
 \RequirePackage{etoolbox}
@@ -63,7 +63,8 @@
     \quiet\endquiet
     % These are defined in sseqmain:
     \class\classoptions\replaceclass\replacesource\replacetarget
-    \d\doptions\kill\structline\structlineoptions\circleclasses
+    \replacestructlines
+    \d\doptions\kill\structline\structlineoptions\extension\extensionoptions\circleclasses
     \lastlabel
     % The following are defined in sseqparsers:
     \pgfmathparse\isalive\lastx\lasty\lastclass\savestack\restorestack\pushstack\nameclass\tagclass
@@ -108,6 +109,9 @@
 \newif\ifsseq at drawedge
 \newif\ifsseq at tikzprims@integershift
 \newif\ifsseq at anchor
+\newif\ifsseq at rangecheck
+\newif\ifsseq at rangecheck@sideways
+
 \sseq at drawedgetrue
 \sseq at tikzprims@integershifttrue
 
@@ -241,12 +245,13 @@
 
 \let\sseq at breakpoint\relax
 \let\sseq at breakpointfinally\@gobble
-\def\sseq at break#1\sseq at breakpoint{}
-\def\sseq at break@finally#1\sseq at breakpoint#2{#2}
+\long\def\sseq at break#1\sseq at breakpoint{}
+\def\sseq at fbreak{\@xp\sseq at break\romannumeral-`0}
+\long\def\sseq at break@finally#1\sseq at breakpoint#2{#2}
 
-\def\sseq at breakfi{\fi\sseq at break}
-\def\sseq at breakfifi{\fi\fi\sseq at break}
-\def\sseq at breakfififi{\fi\fi\fi\sseq at break}
+\long\def\sseq at breakfi{\fi\sseq at break}
+\long\def\sseq at breakfifi{\fi\fi\sseq at break}
+\long\def\sseq at breakfififi{\fi\fi\fi\sseq at break}
 \long\def\sseq at breakdataenv#1\end#2{
     \def\sseq at tempa{sseqdata}\def\sseq at tempb{#2}\ifx\sseqtempa\sseqtempb
         \@xp\sseq at breakdataenv@
@@ -274,8 +279,8 @@
     \let\sseqnewgroup\@gobblethree
 }
 
+\AtBeginEnvironment{sideways}{\sseqset{range check sideways}}
 
-
 \input sseqmessages.code.tex        % Exposes directly: \sseqerrortowarning
 \input sseqcheckdefinitions.code.tex
 
@@ -309,6 +314,7 @@
 \let\sseq at class@object\sseq at class@draw at ifpage
 \let\sseq at differential@object\sseq at differential@draw at ifpage
 \let\sseq at structline@object\sseq at structline@draw at ifpage
+\let\sseq at extension@object\sseq at extension@draw at ifpage
 \let\sseq at circleclass@object\sseq at circleclass@draw at ifpage
 \let\sseq at tikzpath@object\@firstofone
 

Modified: trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqcheckdefinitions.code.tex
===================================================================
--- trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqcheckdefinitions.code.tex	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqcheckdefinitions.code.tex	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% File: sseqcheckdefinitions.code.tex
@@ -28,29 +28,33 @@
 %%
 
 \ExplSyntaxOn
-% I should work out how old the version of xparse has to be before this breaks, but I'm too lazy.
-% It would also be nice if I could figure out how to ensure that my trick of setting \l__xparse_grab_expandably_bool to false works correctly, but this might be difficult
+% I should work out how old the version of xparse has to be before this breaks,
+% but I'm too lazy. It would also be nice if I could figure out how to ensure
+% that my trick of setting \l__cmd_grab_expandably_bool to false works
+% correctly, but this might be difficult
 \@ifpackagelater{xparse}{2017/02/08}{
-    \sseq at checkprotecteddef \__xparse_grab_u:w #1#2 \__xparse_run_code:{
-        \__xparse_grab_u_aux:nnN {#1} {#2} \cs_set_protected_nopar:Npn
+  \cs_if_exist:NTF \__xparse_grab_u:w {
+    \global\sseq at patchxparseUtrue
+  }{
+    \sseq at checkprotecteddef \__cmd_grab_u:w #1#2 \__cmd_run_code:{
+        \__cmd_grab_u_aux:nnN {#1} {#2} \cs_set_protected_nopar:Npn
     }
 
-    \sseq at checkprotecteddef\__xparse_grab_u_aux:nnN #1#2#3
-      {
-        \tl_set:Nn \l__xparse_signature_tl {#2}
-        \exp_after:wN #3 \l__xparse_fn_tl ##1 #1
-          { \__xparse_add_arg:n {##1} }
-        \l__xparse_fn_tl
+    \sseq at checkprotecteddef\__cmd_grab_u_aux:nnN #1#2#3 {
+        \tl_set:Nn \l__cmd_signature_tl {#2}
+        \exp_after:wN #3 \l__cmd_fn_tl ##1 #1
+          { \__cmd_add_arg:n {##1} }
+        \l__cmd_fn_tl
     }
 
 
-    \sseq at checkprotecteddef \__xparse_normalize_type_u:w #1 {
-        \quark_if_recursion_tail_stop_do:nn {#1} { \__xparse_bad_arg_spec:wn }
-        \__xparse_normalize_check_lu:N u
-        \__xparse_add_arg_spec_mandatory:n { u {#1} } % Oct 17, 2018
-%        \int_incr:N \l__xparse_mandatory_args_int
-%        \tl_clear:N \l__xparse_last_delimiters_tl
-        \__xparse_normalize_arg_spec_loop:n
+    \sseq at checkprotecteddef \__cmd_normalize_type_u:w #1 {
+        \quark_if_recursion_tail_stop_do:nn {#1} { \__cmd_bad_arg_spec:wn }
+        \__cmd_normalize_check_lu:N u
+        \__cmd_add_arg_spec_mandatory:n { u {#1} } % Oct 17, 2018
+%        \int_incr:N \l__cmd_mandatory_args_int
+%        \tl_clear:N \l__cmd_last_delimiters_tl
+        \__cmd_normalize_arg_spec_loop:n
     }
 
     \ifsseq at tempif
@@ -59,6 +63,7 @@
         \global\sseq at patchxparseUfalse
     \fi
     \sseq at tempiftrue
+  }
 }{}
 
 \@ifpackagelater{expl3}{2018/10/01}{
@@ -100,6 +105,7 @@
     \sseq at tempiffalse % We'll throw a critical error in spectralsequences.sty to end input
     \endinput
 \fi
+\sseq at tempiftrue
 %%
 %% sseqdrawing.code.tex
 %%
@@ -126,8 +132,21 @@
 \ifsseq at tempif
     \global\sseq at patchfittrue
 \else
-    \sseq at warning{fit-patch-failed}
-    \global\sseq at patchfitfalse
+    % New version of \tikz at calc@anchor
+    \sseq at tempiftrue
+    \sseq at checkdef\tikz at calc@anchor#1.#2\tikz at stop{%
+        \ifcsname pgf at sh@ns@\tikz at pp@name {#1}\endcsname
+            \pgfpointanchor {\tikz at pp@name {#1}}{#2}%
+        \else
+            \pgfpointanchor {#1}{#2}%
+        \fi
+    }
+    \ifsseq at tempif
+        \global\sseq at patchfittrue
+    \else
+        \sseq at warning{fit-patch-failed}
+        \global\sseq at patchfitfalse
+    \fi
 \fi
 
 \sseq at tempiftrue

Modified: trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqdrawing.code.tex
===================================================================
--- trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqdrawing.code.tex	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqdrawing.code.tex	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% File: sseqdrawing.code.tex
@@ -38,9 +38,10 @@
     \sseq at setlayoutparameter{bottomclippadding}{x\sseq at xaxistype}
     \sseq at setlayoutparameter{topclippadding}{x\sseq at xaxistype}
     \sseq at setlayoutparameter{xlabelposition}{x\sseq at xaxistype}
+    \sseq at setlayoutparameter{totalverticalmargin}{x\sseq at xaxistype}
 %
     \sseq at setlayoutparameter{xaxisorigin}{y\sseq at yaxistype}
-    \sseq at setlayoutparameter{drawxaxis}{y\sseq at xaxistype}
+    \sseq at setlayoutparameter{drawxaxis}{y\sseq at yaxistype}
     \sseq at setlayoutparameter{xaxisstartoffset}{y\sseq at yaxistype}
     \sseq at setlayoutparameter{xaxisendoffset}{y\sseq at yaxistype}
     \sseq at setlayoutparameter{leftgridpadding}{y\sseq at yaxistype}
@@ -47,11 +48,23 @@
     \sseq at setlayoutparameter{rightgridpadding}{y\sseq at yaxistype}
     \sseq at setlayoutparameter{leftclippadding}{y\sseq at yaxistype}
     \sseq at setlayoutparameter{rightclippadding}{y\sseq at yaxistype}
-    \sseq at setlayoutparameter{ylabelposition}{y\sseq at xaxistype}
+    \sseq at setlayoutparameter{ylabelposition}{y\sseq at yaxistype}
+    \sseq at setlayoutparameter{totalhorizontalmargin}{y\sseq at yaxistype}
 }
 
 % The appropriate one of these is chosen by the "axis type" keys in sseqkeys.
 
+% Used to calculate available area in range check
+\def\sseq at totalhorizontalmargin@yborder{(\sseq at xaxis@tail + \sseq at yaxisgap + \sseq at xaxis@end at extend + \sseq at clip@padding at right)}
+\def\sseq at totalhorizontalmargin@yframe{(\sseq at ylabelgap + \sseq at maxylabelwidth + \sseq at yaxisgap * 2)}
+\def\sseq at totalhorizontalmargin@ycenter{(\sseq at xaxis@start at extend + \sseq at clip@padding at left + \sseq at xaxis@end at extend + \sseq at clip@padding at right)}
+\def\sseq at totalhorizontalmargin@ynone{(\sseq at xaxis@start at extend + \sseq at clip@padding at left + \sseq at xaxis@end at extend + \sseq at clip@padding at right)}
+
+\def\sseq at totalverticalmargin@xborder{(\sseq at yaxis@tail + \sseq at xaxisgap + \sseq at yaxis@end at extend + \sseq at clip@padding at top)}
+\def\sseq at totalverticalmargin@xframe{(\sseq at xlabelgap + \sseq at xlabelheight + \sseq at xaxisgap * 2)}
+\def\sseq at totalverticalmargin@xcenter{(\sseq at yaxis@start at extend + \sseq at clip@padding at bottom + \sseq at yaxis@end at extend + \sseq at clip@padding at top)}
+\def\sseq at totalverticalmargin@xnone{(\sseq at yaxis@start at extend + \sseq at clip@padding at bottom + \sseq at yaxis@end at extend + \sseq at clip@padding at top)}
+
 % Used to determine axis and ticks placement
 \def\sseq at xaxisorigin@yborder{\sseq at xmin}
 \def\sseq at xaxisorigin@yframe{\sseq at xmin}
@@ -77,7 +90,7 @@
 \def\sseq at topgridpadding@xcenter{\sseq at yaxis@end at extend}
 \def\sseq at bottomgridpadding@xframe{\dimexpr\sseq at xaxisgap-\sseq at xclip@axisgap\relax}
 \def\sseq at topgridpadding@xframe{5cm}
-\def\sseq at bottomgridpadding@xnone{\sseqxaxisgap}
+\def\sseq at bottomgridpadding@xnone{\sseq at xaxisgap}
 \def\sseq at topgridpadding@xnone{\sseq at xaxisgap}
 
 \def\sseq at leftclippadding@yborder{\dimexpr-\sseq at yaxisgap+\sseq at yclip@axisgap\relax}
@@ -369,21 +382,13 @@
 \def\sseq at grid@chess{
     \bgroup
     \pgfscope
-    % Pad on the right and top by either the grid padding, or the remaining piece of the checkerboard before it would start a new square
-    % (it looks ugly to have a tiny sliver). Annoyingly, mod returns its result with the same sign as its input, so in order to reduce mod
-    % \sseq at xgridstep and get a positive result, we have to do it twice. The 0.5cm*scale here matches the -0.5 in the \pgfpathgrid call.
-    \pgfmathsetmacro\sseq at rightpadding{min(
-        \sseq at rightgridpadding,
-        1cm*  mod(mod(-\sseq at xmax,\sseq at xgridstep)+\sseq at xgridstep,\sseq at xgridstep)+0.5cm*\sseq at xscale-0.05cm
-    )}
-    \pgfmathsetmacro\sseq at toppadding{min(
-        \sseq at topgridpadding,
-        1cm * mod(mod(-\sseq at ymax,\sseq at ygridstep)+\sseq at ygridstep,\sseq at ygridstep)+0.5cm*\sseq at yscale-0.02cm
-    )}
     % Because of complicated aliasing issues that arise when misusing the \pgfgrid command in this way,
     % it's more convenient to add a clip than to actually stop things in the right place.
-    \clip        (\sseq at xmin-\sseq at xoffset,\sseq at ymin-\sseq at yoffset) ++ (-0.48, -0.48)
-        rectangle ([shift={(\sseq at rightpadding pt,\sseq at toppadding pt)}]\sseq at xmax,\sseq at ymax);
+    \clip        (\sseq at xmin-0.49,\sseq at ymin-0.49)
+       rectangle (\sseq at xmax+0.49,\sseq at ymax+0.49);
+%    \clip        (\sseq at xmin,\sseq at ymin) ++ (-0.49, -0.49)
+%       rectangle ([shift={(0.5cm*\sseq at yscale,0.5*\sseq at xscale)}]
+%                    \sseq at xmax,\sseq at ymax);
 %
     \sseq at useclip
     \pgfsetcolor{\sseq at gridcolor}
@@ -433,14 +438,16 @@
     \pgfsetdash{{1cm*\sseq at stepscale}{1cm*\sseq at stepscale}}{1cm*\sseq at stepscale}
 %
     % Naturally some trial and error occurred here too.
-    % Note the huge multiples of \sseq at xgridstep I added in -- they probably aren't necessary, but I don't understand what's going on so whatever.
+    % Note the huge multiples of \sseq at xgridstep I added in -- they probably aren't necessary, but I don't understand what's going on so whatever. They make sure that the pattern always extends past the edge of the clipping region. Otherwise the gird occasionally stops short for some reason.
     % The basic idea is that things need to be divisible by twice the grid step. The part I added in the shift above
     % was the remainder when you divide \sseq at xmin by twice the grid step, now we need to add in the multiple of twice the grid step.
     % The -0.5 is ensuring that the checkerboard boundaries lie at half-integer coordinates (I think).
     \pgfpathgrid[stepx= 2cm*\sseq at stepscale,stepy=2cm*\sseq at stepscale]
     { \pgfpointxy
-        { -0.5 + \sseq at intdivfloor{\numexpr\sseq at xmin - \sseq at xgridstep\relax}{2*\sseq at xgridstep}*2*\sseq at xgridstep + \sseq at xoffset - 50*\sseq at xgridstep }
-        { -0.5 + \sseq at intdivfloor{\numexpr\sseq at ymin - \sseq at ygridstep\relax}{2*\sseq at ygridstep}*2*\sseq at ygridstep + \sseq at yoffset - 50*\sseq at ygridstep}
+        { -0.5 + \sseq at intdivfloor{\numexpr\sseq at xmin - \sseq at xgridstep\relax}{2*\sseq at xgridstep}*2*\sseq at xgridstep + \sseq at xoffset -50*\sseq at xgridstep
+        }
+        { -0.5 + \sseq at intdivfloor{\numexpr\sseq at ymin - \sseq at ygridstep\relax}{2*\sseq at ygridstep}*2*\sseq at ygridstep + \sseq at yoffset -50*\sseq at ygridstep
+        }
     }{ \pgfpointxy
         { \sseq at xmax + \sseq at xoffset + 50*\sseq at xgridstep }
         { \sseq at ymax + \sseq at yoffset + 50*\sseq at ygridstep  }
@@ -531,7 +538,7 @@
 %%% Draw Classes
 %%%
 %%% Class offsets
-\sseqnewclasspattern{standard}{
+\SseqNewClassPattern{standard}{
     (0,0);
     (-0.13,0)(0.13,0);
     (-0.2,0)(0,0)(0.2,0);
@@ -945,7 +952,11 @@
     \def\pgfkeysdefaultpath{/sseqpages/#3/}%
     \sseq at options@bothpassmode
     \sseq at thesseqstyle
-    \sseq at theedgestyle\csname sseq at the#3style\endcsname\the\sseq at scope@toks
+    \sseq at theedgestyle\csname sseq at the#3style\endcsname
+    \ifsseq at thispage
+        \csname sseq at thethispage#3style\endcsname
+    \fi
+    \the\sseq at scope@toks
     #4%
     \csname sseq at collections@#3 at hook\endcsname
     \pgftransformshift{\pgfqpointxy{-\the\sseq at x}{-\the\sseq at y}}%
@@ -989,9 +1000,16 @@
             \fi
         \fi
         \ifsseq at needstikz
-            \draw[/sseqpages,
-                /utils/exec={\sseq at thesseqstyle\sseq at theedgestyle\csname sseq at the#3style\endcsname\the\sseq at scope@toks
-                             \temparrowstartspec\temparrowendspec #4}%
+            \draw[/sseqpages,%
+                /utils/exec={%
+                    \sseq at thesseqstyle\sseq at theedgestyle
+                    \csname sseq at the#3style\endcsname
+                    \ifsseq at thispage
+                        \csname sseq at thethispage#3style\endcsname
+                    \fi
+                    \the\sseq at scope@toks
+                    \temparrowstartspec\temparrowendspec #4%
+                }%
             ]  (tempa) to (tempb);%
         \else
             \temparrowstartspec
@@ -1126,14 +1144,35 @@
   \tikz at lib@fit at scan%
 }
 
+%\def\tikz at calc@anchor#1.#2\tikz at stop{%
+%    \ifcsname pgf at sh@ns@\tikz at pp@name {#1}\endcsname
+%        \pgfpointanchor {\tikz at pp@name {#1}}{#2}%
+%    \else
+%        \pgfpointanchor {#1}{#2}%
+%    \fi
+%}
+%l.8 \show\tikz at calc@anchor
+
 % This is copied with modification from \pgf\frontendlayer\tikz\tikz.code.tex line 5164
 \def\sseq at fit@tikz at calc@anchor#1.#2\tikz at stop{%
-  \pgfutil at ifundefined{pgf at sh@ns@#1}{\sseq at tempiffalse}{%If the node doesn't exist, don't throw an error but record that we should skip it
-    \pgfpointanchor{\tikz at pp@name{#1}}{#2}%
-  }%s
+    \ifcsname pgf at sh@ns@\tikz at pp@name {#1}\endcsname
+        \pgfpointanchor {\tikz at pp@name {#1}}{#2}%
+    \else
+        \ifcsname pgf at sh@ns@#1\endcsname
+            \pgfpointanchor {#1}{#2}%
+        \else
+            \sseq at tempiffalse
+        \fi
+    \fi
 }
+%\def\sseq at fit@tikz at calc@anchor#1.#2\tikz at stop{%
+%  \pgfutil at ifundefined{pgf at sh@ns@#1}{\sseq at tempiffalse}{%If the node doesn't exist, don't throw an error but record that we should skip it
+%    \pgfpointanchor{\tikz at pp@name{#1}}{#2}%
+%  }%s
+%}
 
 
+
 %%
 %% Patch tikz coords
 %%
@@ -1148,15 +1187,28 @@
     \let\tikz at grid\sseq at tikz@grid
     \let\tikz at scan@handle at options\sseq at tikz@scan at handle@options
     \let\tikz@@@parse at polar\sseq at tikz@@@parse at polar
+    \let\tikz at scan@relative\sseq at tikz@scan at relative
 }
+\newif\ifsseq at draw@addoffset % control whether to offset coordinates by (\sseq at xoffset,\sseq at yoffset).
+\sseq at draw@addoffsettrue
 
 % Some of the stuff in tikzlibrarycalc will probably be broken, hopefully not too much
 \let\sseq at tikz@scan at one@point at noshift\tikz at scan@one at point
 \let\sseq at tikz@@@parse at regular@save\tikz@@@parse at regular
 
+\def\sseq at tikz@scan at relative#1+{%
+    \global\sseq at draw@addoffsetfalse
+    %\global\let\tikz@@@parse at regular\sseq at tikz@@@parse at regular@save
+    \pgfutil at ifnextchar+{%
+        \tikz at scan@plusplus{\global\sseq at draw@addoffsettrue#1}%
+    }{%
+        \tikz at scan@oneplus{\global\sseq at draw@addoffsettrue#1}%
+    }%
+}
+
 \def\sseq at tikz@scan at one@point at noshift@active#1{%
-    \let\tikz@@@parse at regular\sseq at tikz@@@parse at regular@save
-    \def\sseq at scanonepoint@cmd{\let\tikz@@@parse at regular\sseq at tikz@@@parse at regular#1}
+    \global\sseq at draw@addoffsetfalse
+    \def\sseq at scanonepoint@cmd{\global\sseq at draw@addoffsettrue#1}
     \tikz at scan@one at point\sseq at scanonepoint@cmd%
 }
 
@@ -1167,8 +1219,9 @@
 \def\sseq at tikz@to at curve@path{%
   [every curve to]
   \pgfextra{
+    %\sseq at draw@addoffsetfalse
     \let\tikz@@@parse at regular\sseq at tikz@@@parse at regular@save % I added this to prevent repeated offsets from screwing us up
-    %\let\sseq at tikz@scan at one@point at noshift\tikz at scan@one at point
+    \let\sseq at tikz@scan at one@point at noshift\tikz at scan@one at point
     \iftikz at to@relative\tikz at to@compute at relative\else\tikz at to@compute\fi
   }
   \tikz at computed@path
@@ -1197,24 +1250,25 @@
 \def\sseq at tikz@@@parse at regular#1#2#3){%
   \pgfutil at in@,{#3}%
   \ifpgfutil at in@%
-    \tikz at parse@splitxyz{#1}{#2}#3,%
+    \tikz at parse@splitxyz{#1}{#2}#3,% Perhaps put an error here? We probably don't handle 3d coords correctly.
   \else%
     \tikz at checkunit{#2}%
     \iftikz at isdimension%
-      \tikz at checkunit{#3}%
-      \iftikz at isdimension%
-        \def\@next{#1{\pgfpointxy{(#2)/1cm+\sseq at xoffset}{(#3)/1cm+\sseq at yoffset}}}%
-      \else%
-        \def\@next{#1{\pgfpointxy{(#2)/1cm+\sseq at xoffset}{#3+\sseq at yoffset}}}%
-      \fi%
-    \else%
-      \tikz at checkunit{#3}%
-      \iftikz at isdimension%
-        \def\@next{#1{\pgfpointxy{#2+\sseq at xoffset}{(#3)/1cm+\sseq at yoffset}}}%
-      \else%
-        \def\@next{#1{\pgfpointxy{#2+\sseq at xoffset}{#3+\sseq at yoffset}}}%
-      \fi%
-    \fi%
+        \def\temp at xcoord{(#2)/1cm}%
+    \else
+        \def\temp at xcoord{#2}%
+    \fi
+    \tikz at checkunit{#3}%
+    \iftikz at isdimension
+        \def\temp at ycoord{(#3)/1cm}%
+    \else
+        \def\temp at ycoord{#3}%
+    \fi
+    \ifsseq at draw@addoffset
+        \edef\temp at xcoord{\unexpanded\@xp{\temp at xcoord}+\unexpanded\@xp{\sseq at xoffset}}%
+        \edef\temp at ycoord{\unexpanded\@xp{\temp at ycoord}+\unexpanded\@xp{\sseq at yoffset}}%
+    \fi
+    \edef\@next{\unexpanded{#1}{\@nx\pgfpointxy{\unexpanded\@xp{\temp at xcoord}}{\unexpanded\@xp{\temp at ycoord}}}}%
   \fi%
   \@next%
 }

Modified: trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqforeach.code.tex
===================================================================
--- trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqforeach.code.tex	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqforeach.code.tex	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% File: sseqforeach.code.tex
@@ -66,7 +66,7 @@
 }
 
 \def\sseq at DoUntilOutOfBounds@ #1 {
-    \sseq at esetthiscall{\string\DoUntilOutOfBoundsThenNMore}
+    \sseq at esetthiscall{\string\DoUntilOutOfBounds}
     \sseq at opushstacktrace{\string\DoUntilOutOfBounds}
     \ifx\sseq at xminmax\@gobbletwo\else\ifx\sseq at yminmax\@gobbletwo\else
         \sseq at error@x{DoUntil-no-bound}{\string\DoUntilOutOfBounds}

Modified: trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqkeys.code.tex
===================================================================
--- trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqkeys.code.tex	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqkeys.code.tex	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% File: sseqkeys.code.tex
@@ -595,8 +595,8 @@
 	\pgfkeysalso{/sseqpages/alias/.expand once=\detokenize\@xp{\sseq at class@name}}%
     },
     show name/.store in=\sseq at class@showname,
-    page/.code={\sseq at getnumrange\sseq at class@page{#1}},% page & gen are only for \classoptions.
-    generation/.code={\sseq at getnumrange\sseq at gen{#1}}, % \class tests if \sseq at class@page is set and throw an error if so.
+    page/.code={\sseq at getnumrange@defaultupperboundinfty\sseq at class@page{#1}},% page & gen are only for \classoptions.
+    generation/.code={\sseq at getnumrange@defaultupperboundinfty\sseq at gen{#1}}, % \class tests if \sseq at class@page is set and throw an error if so.
     tag/.code={\sseq at d@addto at macro\sseq at class@tag{#1}},
     offset/.store in=\sseq at tempoffset,
     tooltip/.sseq @ first pass code={\ifx\sseqtooltip\undefined \sseq at error{no-tooltip}\else \def\sseq at tooltip{#1}\fi},
@@ -604,24 +604,47 @@
 }
 
 \pgfqkeys{/sseqpages/struct line}{
-    page/.code={\sseq at getnumrange\sseq at structline@page{#1}}
+    page/.code={\sseq at getnumrange@defaultupperboundinfty\sseq at structline@page{#1}}
 }
 
 \def\sseq at fitalso{}
 \pgfqkeys{/sseqpages/fit}{
     fit/.sseq @ first pass code={\sseq at d@addto at macro\sseq at fitalso{#1}},
-    page/.code={\sseq at getnumrange\sseq at fit@page{#1}}
+    page/.code={\sseq at getnumrange@defaultupperboundinfty\sseq at fit@page{#1}}
 }
 
-\def\sseq at getnumrange#1#2{
+\def\sseq at getnumrange#1#2{%
     \pgfutil at in@{--}{#2}\ifpgfutil at in@
         \sseq at getnumrange@range#1#2\sseq at nil
     \else
+        \sseq at getnumrange@range#1#2--#2\sseq at nil
+    \fi
+}
+
+\def\sseq at getnumrange@defaultupperboundinfty#1#2{%
+    \pgfutil at in@{--}{#2}\ifpgfutil at in@
+        \sseq at getnumrange@range#1#2\sseq at nil
+    \else
         \sseq at getnumrange@range#1#2--\sseq at infinity\sseq at nil
     \fi
 }
-\def\sseq at getnumrange@range#1#2--#3\sseq at nil{\edef#1{\the\numexpr#2}\@xp\edef\csname\sseq at macroname#1max\endcsname{\the\numexpr#3}}
 
+\def\sseq at getnumrange@range#1#2--#3\sseq at nil{%
+    \ifx\infty#2
+        \edef#1{\sseq at infinity}%
+        \@xp\edef\csname\sseq at macroname#1max\endcsname{\sseq at infinity}%
+    \else
+        \edef#1{\the\numexpr#2}%
+        \ifx\infty#3
+            \@xp\edef\csname\sseq at macroname#1max\endcsname{\sseq at infinity}%
+        \else
+            \@xp\edef\csname\sseq at macroname#1max\endcsname{\the\numexpr#3}%
+        \fi
+    \fi
+}
+
+
+
 %% Needs tikz
 % Force \class or \d to fall back to using tikz to render their output
 % Rather than using the faster direct \pgf primitives (largely copied from tikz to maximize compatibility)
@@ -1116,7 +1139,6 @@
             \sseq at temp@ii/.code/.expanded={%
                 \unexpanded{#3{##1}}{\sseq at temp=\unexpanded{##1}}%
                 \unexpanded{\edef#1{\unexpanded\@xp{\sseq at sanitize@output}}}%
-                %\show\@nx#1
                 \sseq at breakpoint
             },
             \sseq at temp@ii/.value required,
@@ -1380,6 +1402,15 @@
     update existing/.sseq default code={\sseq at updateexistingtrue}
 }
 
+\def\sseq at printnum@inftytosymbol#1{%
+    \ifnum#1=\sseq at infinity\relax
+        $\infty$%
+    \else
+        #1%
+    \fi
+}
+
+
 \sseq at addtostorelist\sseq at grid{\relax}
 \sseq at addiftostorelist{hasdegree}
 \let\sseq at maybemathswitch\relax
@@ -1388,18 +1419,28 @@
     name/.sseq default error,
     ~page/.code={
         \ifsseq at hasname
-            \sseq at getnumrange\sseq at thepage{#1}
+            \sseq at getnumrange\sseq at thepage{#1}%
             \sseq at thepagecount=\sseq at thepage\relax
             \let\page\sseq at thepage
+            \ifnum\sseq at thepage=\sseq at infinity
+                \def\page{$\infty$}%
+            \fi
+            \def\sseq at temp{\sseq at novalue}
+            \ifx\sseq at printpageas\sseq at temp
+                \def\sseq at printpageas{Page \page}
+                \ifnum\sseq at thepage<\sseq at thepagemax
+                    \ifnum\sseq at thepagemax=\sseq at infinity\relax
+                        \def\sseq at printpageas{Page \page\space(all differentials)}
+                    \else
+                        \def\sseq at printpageas{Page \page\space(differentials of length $\leq\sseq at thepagemax$)}
+                    \fi
+                \fi
+            \fi
             \edef\sseq at thepagemm{\the\numexpr\sseq at thepagecount-1\relax}
-            \ifx\sseq at thepagemax\sseq at infinity
-                \edef\sseq at thepagemaxpp{\the\numexpr\sseq at thepagecount+1\relax}
+            \ifnum\sseq at thepagemax=\z@
+                \let\sseq at thepagemaxpp\sseq at infinity
             \else
-                \ifnum\sseq at thepagemax=\z@
-                    \let\sseq at thepagemaxpp\sseq at infinity
-                \else
-                    \edef\sseq at thepagemaxpp{\the\numexpr\sseq at thepagemax+1\relax}
-                \fi
+                \edef\sseq at thepagemaxpp{\the\numexpr\sseq at thepagemax+1\relax}
             \fi
         \else
             \sseq at error{page-no-name}
@@ -1465,6 +1506,21 @@
     add class placement transform/.value required,
 }
 
+
+\sseq at addiftostorelist@truedefault{rangecheck}
+\sseq at addiftostorelist{rangecheck at sideways}
+\sseq at globalkeys{%
+    range check standard/.code={\sseq at rangechecktrue\sseq at rangecheck@sidewaysfalse},
+    range check standard/.sseq default code={%
+        \def\sseq at rangecheck@default{\global\sseq at rangechecktrue}%
+        \def\sseq at rangecheck@sideways at default{\global\sseq at rangecheck@sidewaysfalse}%
+    },
+    range check sideways/.code=rangecheck at sideways,
+    range check sideways/.sseq default code={\def\sseq at rangecheck@sideways at default{\global\sseq at rangecheck@sidewaystrue}},
+    range check off/.code={\sseq at rangecheckfalse},
+    range check off/.sseq default code={\def\sseq at rangecheck@default{\global\sseq at rangecheckfalse}},
+}
+
 \sseq at mathnodestrue
 
 \sseq at addtostorelist\sseq at targetx{}\sseq at addtostorelist\sseq at targety{}
@@ -1600,10 +1656,12 @@
 \sseq at addtostorelist{\sseq at xtickfn}{} % These should initially be the identity macro, but addtostorelist doesn't accept functions as default
 \sseq at addtostorelist{\sseq at ytickfn}{} % so the default is instated in begin{sseqdata} / begin{sseqpicture}.
 
+\let\sseq at printpageas\relax
 \sseq at globalkeys{%
     title/.sseq store in=\sseq at title{},
 	title style/.sseq append to style={/sseqpages/global/every title}{at={(0.5*\xmin+0.5*\xmax,\ymax)}},
     draw title/.sseq is if=drawtitle,
+    print page as/.sseq store in=\sseq at printpageas{\sseq at novalue},
     no title/.code=\sseq at drawtitlefalse,
 %
     x label/.sseq store in=\sseq at xaxislabel{},
@@ -2052,7 +2110,7 @@
     page constraint or/.code={
         \sseq at updatepageconstraint{#1}{||}
     },
-    page/.code={\sseq at getnumrange\temp{#1}\sseq at updatepageconstraintrange},
+    page/.code={\sseq at getnumrange@defaultupperboundinfty\temp{#1}\sseq at updatepageconstraintrange},
     set page constraint/.store in=\sseq at pageconstraint,
     background/.code={\sseq at standardparse\sseq at setsavedpaths{background}\pgfkeysalso{standard parse}},
 }

Modified: trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqloadstore.code.tex
===================================================================
--- trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqloadstore.code.tex	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqloadstore.code.tex	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% File: sseqloadstore.code.tex
@@ -129,6 +129,7 @@
 \def\sseq at tempsavedpaths{}
 \def\sseq at savedpaths@addclass at standard#1{\sseq at x@addto at macro\sseq at savedpaths{\@nx\sseq at class@object{#1}}}
 \def\sseq at savedpaths@adddifferential at standard#1{\sseq at x@addto at macro\sseq at savedpaths{\@nx\sseq at differential@object{#1}}}
+\def\sseq at savedpaths@addextension at standard#1{\sseq at x@addto at macro\sseq at savedpaths{\@nx\sseq at extension@object{#1}}}
 \def\sseq at savedpaths@addstructline at standard#1{\sseq at x@addto at macro\sseq at savedpaths{\@nx\sseq at structline@object{#1}}}
 \def\sseq at savedpaths@xaddtikzpath at standard#1{\sseq at x@addto at macro\sseq at savedpaths{\@nx\sseq at tikzpath@object{#1}}}
 \def\sseq at savedpaths@add at standard{\sseq at g@addto at macro\sseq at savedpaths}
@@ -138,6 +139,7 @@
 
 \def\sseq at savedpaths@addclass at temporary#1{\sseq at x@addto at macro\sseq at tempsavedpaths{\@nx\sseq at class@draw at ifpage{#1}}}
 \def\sseq at savedpaths@adddifferential at temporary#1{\sseq at x@addto at macro\sseq at tempsavedpaths{\@nx\sseq at differential@draw at ifpage{#1}}}
+\def\sseq at savedpaths@addextension at temporary#1{\sseq at x@addto at macro\sseq at tempsavedpaths{\@nx\sseq at extension@draw at ifpage{#1}}}
 \def\sseq at savedpaths@addstructline at temporary#1{\sseq at x@addto at macro\sseq at tempsavedpaths{\@nx\sseq at structline@draw at ifpage{#1}}}
 \def\sseq at savedpaths@xaddtikzpath at temporary#1{\sseq at x@addto at macro\sseq at tempsavedpaths{#1}}
 \def\sseq at savedpaths@add at temporary{\sseq at g@addto at macro\sseq at tempsavedpaths}
@@ -149,6 +151,7 @@
 \def\sseq at savedpaths@addclass at background#1{\sseq at error@internal at n{illegal-add-background-mode}{\sseq at savedpaths@addclass}}
 \def\sseq at savedpaths@adddifferential at background#1{\sseq at error@internal at n{illegal-add-background-mode}{\sseq at savedpaths@adddifferential}}
 \def\sseq at savedpaths@addstructline at background#1{\sseq at error@internal at n{illegal-add-background-mode}{\sseq at savedpaths@addstructline}}
+\def\sseq at savedpaths@addextension at background#1{\sseq at error@internal at n{illegal-add-background-mode}{\sseq at savedpaths@addextension}}
 \def\sseq at savedpaths@xaddtikzpath at background#1{\sseq at x@addto at macro\sseq at savedbackgroundpaths{#1}}
 \def\sseq at savedpaths@add at background{\sseq at g@addto at macro\sseq at savedbackgroundpaths}
 \def\sseq at savedpaths@xadd at background{\sseq at x@addto at macro\sseq at savedbackgroundpaths}
@@ -157,6 +160,7 @@
 \def\sseq at savedpaths@addclass at ignore#1{}
 \def\sseq at savedpaths@adddifferential at ignore#1{}
 \def\sseq at savedpaths@addstructline at ignore#1{}
+\def\sseq at savedpaths@addextension at ignore#1{}
 \def\sseq at savedpaths@xaddtikzpath at ignore#1{}
 \def\sseq at savedpaths@add at ignore#1{}
 \def\sseq at savedpaths@xadd at ignore#1{}
@@ -167,6 +171,7 @@
     \@xp\let\@xp\sseq at savedpaths@addclass       \csname sseq at savedpaths@addclass@#1\endcsname
     \@xp\let\@xp\sseq at savedpaths@adddifferential\csname sseq at savedpaths@adddifferential@#1\endcsname
     \@xp\let\@xp\sseq at savedpaths@addstructline  \csname sseq at savedpaths@addstructline@#1\endcsname
+    \@xp\let\@xp\sseq at savedpaths@addextension  \csname sseq at savedpaths@addextension@#1\endcsname
     \@xp\let\@xp\sseq at savedpaths@xaddtikzpath  \csname sseq at savedpaths@xaddtikzpath@#1\endcsname
     \@xp\let\@xp\sseq at savedpaths@add            \csname sseq at savedpaths@add@#1\endcsname
     \@xp\let\@xp\sseq at savedpaths@xadd            \csname sseq at savedpaths@xadd@#1\endcsname

Modified: trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqmacromakers.code.tex
===================================================================
--- trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqmacromakers.code.tex	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqmacromakers.code.tex	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% File: sseqmacromakers.code.tex
@@ -40,6 +40,9 @@
           { \__xparse_add_arg:n {##1} #1 }
         \l__xparse_fn_tl
       }
+    \ifx\__xparse_add_grabber_mandatory:N\undefined
+        \let \__xparse_add_grabber_mandatory:N \__xparse_add_grabber:N
+    \fi
     \cs_new_protected:Npn \sseq__xparse_add_type_U:w #1
       {
         \__xparse_flush_m_args:
@@ -48,19 +51,38 @@
         \tl_put_right:Nn \l__xparse_signature_tl { {#1} }
         \__xparse_prepare_signature:N
       }
+%
+%
+    \cs_new_protected:Npn \sseq__cmd_grab_U:w #1#2 \__cmd_run_code:
+      { \sseq__cmd_grab_U_aux:nnN {#1} {#2} \cs_set_protected_nopar:Npn }
+    \cs_new_protected:Npn \sseq__cmd_grab_U_aux:nnN #1#2#3
+      {
+        \tl_set:Nn \l__cmd_signature_tl {#2}
+        \exp_after:wN #3 \l__cmd_fn_tl ##1 #1
+          { \__cmd_add_arg:n {##1} #1 }
+        \l__cmd_fn_tl
+      }
+    \cs_new_protected:Npn \sseq__cmd_add_type_U:w #1
+      {
+        \__cmd_flush_m_args:
+        \__cmd_add_default:
+        \__cmd_add_grabber:N U
+        \tl_put_right:Nn \l__cmd_signature_tl { {#1} }
+        \__cmd_prepare_signature:N
+      }
 }
 
-
 \@ifpackagelater{xparse}{2017/02/08}{
-    \@ifpackagelater{xparse}{2018/10/17}{ 
+    \@ifpackagelater{xparse}{2018/10/17}{
         \ifsseq at patchxparseU
             \the\sseq at patchxparseUnewcode
         \else
             % Assumptions failed, so just make U give an error (this isn't such a big deal since we don't use it for \d anymore).
-            \cs_new_protected:Npn \sseq__xparse_add_type_U:w #1
+            \cs_new_protected:Npn \sseq__cmd_add_type_U:w #1
               {
                 \sseq at error{U-xparse-incompatible}
               }
+            \cs_new_eq:NN \sseq__xparse_add_type_U:w \sseq__cmd_add_type_U
         \fi
     }{
         \the\sseq at patchxparseUnewcode
@@ -105,7 +127,14 @@
         \__xparse_add_arg_spec_mandatory:n { U {#1} }
         \__xparse_normalize_arg_spec_loop:n
     }
-}{ 
+
+    \cs_new_protected:Npn \sseq__cmd_normalize_type_U:w #1 {
+        \quark_if_recursion_tail_stop_do:nn {#1} { \__cmd_bad_arg_spec:wn }
+        \__cmd_normalize_check_lu:N U
+        \__cmd_add_arg_spec_mandatory:n { U {#1} }
+        \__cmd_normalize_arg_spec_loop:n
+    }
+}{
     \cs_new_protected:Npn \sseq__xparse_normalize_type_U:w #1 {
         \quark_if_recursion_tail_stop_do:nn {#1} { \__xparse_bad_arg_spec:wn }
         \__xparse_normalize_check_lu:N U
@@ -116,14 +145,20 @@
     }
 }
 % Expandable commands are a menace to us because they define a bunch of helper commands that we then have to keep track of.
-% We are too lazy to do this, so force \l__xparse_grab_expandably_bool to be false.
+% We are too lazy to do this, so force \l__cmd_grab_expandably_bool to be false.
 % This is backwards compatible (I think) because \bool_set_false:N just performs a chardef (no existence check)
-% so in old versions, \l__xparse_grab_expandably_bool will be created harmlessly.
-\let\sseq__xparse_prepare_signature:n\__xparse_prepare_signature:n
-\pretocmd\sseq__xparse_prepare_signature:n { \bool_set_false:N \l__xparse_grab_expandably_bool } {}{\error}
+% so in old versions, \l__cmd_grab_expandably_bool will be created harmlessly.
+\let\sseq__cmd_prepare_signature:n\__cmd_prepare_signature:n
+\ifx\sseq__cmd_prepare_signature:n\undefined
+    \let\sseq__cmd_prepare_signature:n\__xparse_prepare_signature:n
+\fi
+\pretocmd\sseq__cmd_prepare_signature:n { \bool_set_false:N \l__cmd_grab_expandably_bool } {}{\error}
 
 % I would like to patch the \__xparse_grab_U:w's in my commands into \sseq__xparse_grab_U:w's but I can't because of -NoValue-.
-\def\sseq at install@xparse at Uarggrabber{ \cs_set_eq:NN \__xparse_grab_U:w \sseq__xparse_grab_U:w }
+\def\sseq at install@xparse at Uarggrabber{%
+    \cs_set_eq:NN \__xparse_grab_U:w \sseq__xparse_grab_U:w
+    \cs_set_eq:NN \__cmd_grab_U:w \sseq__cmd_grab_U:w
+}
 
 %%% \sseq at DeclareDocumentCommand
 %
@@ -151,10 +186,13 @@
 
 \cs_new_protected:Npn\sseq at DeclareDocumentCommandAs#1#2#3#4{
     \group_begin:
+    \cs_set_eq:NN \__cmd_add_type_U:w \sseq__cmd_add_type_U:w
     \cs_set_eq:NN \__xparse_add_type_U:w \sseq__xparse_add_type_U:w
+    \cs_set_eq:NN \__cmd_normalize_type_U:w \sseq__cmd_normalize_type_U:w
     \cs_set_eq:NN \__xparse_normalize_type_U:w \sseq__xparse_normalize_type_U:w
-    \cs_set_eq:NN \__xparse_prepare_signature:n \sseq__xparse_prepare_signature:n
-    %\cs_set:Npn   \__xparse_declare_cmd_code:Nnn {\bool_set_false:N \l__xparse_grab_expandably_bool\__xparse_declare_cmd_code_aux:Nnn}
+    \cs_set_eq:NN \__cmd_prepare_signature:n \sseq__cmd_prepare_signature:n
+    \cs_set_eq:NN \__xparse_prepare_signature:n \sseq__cmd_prepare_signature:n
+    %\cs_set:Npn   \__cmd_declare_cmd_code:Nnn {\bool_set_false:N \l__cmd_grab_expandably_bool\__cmd_declare_cmd_code_aux:Nnn}
     \sseq at installmsghooks
     \def\sseq at error@setup{}
     \def\sseq at error@cleanup{\sseq at errortrue}
@@ -209,7 +247,7 @@
 \newtoks\sseq at macro@defaultarggetters at toks
 
 \cs_new_protected:Npn\DeclareSseqCommand#1#2#3{%
-    \cs_if_exist:cTF { sseq @ builtin @ \cs_to_str:N #1 } {\sseq at error@x{wont-override-system-macro}{\string#1}\sseq at break} {}
+    \cs_if_exist:cTF { sseq @ \cs_to_str:N #1 @@unique@@ start} {\sseq at error@x{wont-override-builtin}{\string#1}\sseq at break} {}
     \cs_if_free:cT { sseq @ usermacro @ \cs_to_str:N #1 } {
         \sseq at x@addto at macro { \sseq at installmacros } { \let \exp_not:N #1 \exp_not:c { sseq @ usermacro @ \cs_to_str:N #1 } }
     }
@@ -344,7 +382,8 @@
 \egroup
 
 
-% When there are arguments with default values (O, D, R, G), we need to put them into temporary macros to compare them and see if they are the default value
+% When there are arguments with default values (O, D, R, G), we need to put them
+% into temporary macros to compare them and see if they are the default value
 % that's what \sseq at macro@defaultarggetters at toks is for.
 \def\sseq at parseargspec#1#2{%
     \sseq at tempcount=\z@

Modified: trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqmain.code.tex
===================================================================
--- trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqmain.code.tex	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqmain.code.tex	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% File: sseqmain.code.tex
@@ -103,9 +103,10 @@
             \@xp\@nx\csname pgfk@/sseqpages/global/{\sseq at currentoptionpath} options/. at cmd\endcsname
     }
     \sseq at savedpaths@xadd{\@nx\sseq at style@object{\sseq at stylelist}}
-    \sseq at savedpaths@add{\begingroup} % prevent some of the two-pass user macros horrors
+    \sseq at savedpaths@add{\begingroup\sseq at startcontentmarker} % prevent some of the two-pass user macros horrors
     \let\sseq at error@setup\sseq at error@setup at withinfo
 }
+\let\sseq at startcontentmarker\relax
 
 % Just store all the settings
 \def\endsseqdata{%
@@ -152,6 +153,8 @@
     \gdef\sseq at pagecleanup{}% For undoing local option settings
 %
     \def\sseq at thepage{0}% page defaults to 0
+    \def\thepage{\sseq at printpageas}
+    \def\page{\sseq at printnum@inftytosymbol{\sseq at thepage}}
     \sseq at thepagecount=\z@
     \pgfqkeys{/sseqpages/global/name only}{#1}% Get the name
     \sseq at tempiftrue
@@ -240,26 +243,66 @@
         \@xp\sseq at break
     \fi
 %
-    \sseq at tempdimen = \dimexpr \textwidth -\sseq at clip@padding at right - \sseq at xaxis@end at extend - \sseq at xaxis@start at extend - \sseq at yaxisgap \relax
-    \sseq at tempcount = \numexpr \sseq at tempdimen /\sseq at xscalecm \relax
-    \ifnum \numexpr\sseq at xmax-\sseq at xmin + 1 > \sseq at tempcount
-      \pgfmathparse{\sseq at tempdimen/1cm/(\sseq at xmax-\sseq at xmin+1)}
-      \sseq at error@xxxx{range-overflow}{x}
-            {from \sseq at xmin\space to \sseq at xmax\space (xmax - xmin = \the\numexpr\sseq at xmax-\sseq at xmin)}
-            {\the\sseq at tempcount}% max x range
-            {\pgfmathresult}% max xscale
-        %\@xp\sseq at break
-    \fi
+    \sseq at setlayoutparameters
+    \ifsseq at rangecheck
+        % Calculate available space
+        
+        % We might need to know the dimensions of the tick marks in order to calculate "margin" size.
+        \bgroup
+            \@xp\tikzset\@xp{\sseq at xtickstyle}
+            \pgfmathparse{height("\sseq at xmin") + depth("\sseq at xmin")}
+            \edef\sseq at xlabelheight{\pgfmathresult pt}
+            \sseq at smuggle@macro\sseq at xlabelheight
+        \egroup
+        \bgroup
+            \@xp\tikzset\@xp{\sseq at ytickstyle}
+            \pgfmathparse{max(width("\sseq at ymax"), width("\sseq at ymin"))}
+            \edef\sseq at maxylabelwidth{\pgfmathresult pt}
+            \sseq at smuggle@macro\sseq at maxylabelwidth
+        \egroup
+        
+        % "totaldirmargin" isn't really quite margin: it's the distance between
+        % the bounding box (xmin, ymin) -- (xmax, ymax) and the bounding box of
+        % the resulting figure. 
 %
-    \sseq at tempdimen = \dimexpr \textheight - \sseq at clip@padding at top - \sseq at yaxis@end at extend - \sseq at yaxis@start at extend - \sseq at xaxisgap \relax
-    \sseq at tempcount = \numexpr \sseq at tempdimen /\sseq at yscalecm \relax
-    \ifnum \numexpr\sseq at ymax-\sseq at ymin +1 > \sseq at tempcount
-        \pgfmathparse{\sseq at tempdimen/1cm/(\sseq at ymax-\sseq at ymin+1)}
-        \sseq at error@xxxx{range-overflow}{y}
-            {from \sseq at ymin\space to \sseq at ymax\space (ymax - ymin = \the\numexpr\sseq at ymax-\sseq at ymin)}
-            {\the\sseq at tempcount}% max x range
-            {\pgfmathresult}% max xscale
-        \@xp\sseq at break
+        % By subtracting the "margin" distance from the page width / height, we
+        % get the amount of space available for the content.
+        \sseq at tempxdimen = \dimexpr \linewidth - \sseq at totalhorizontalmargin@yborder - 0.1pt
+        \sseq at tempydimen = \dimexpr \textheight - \sseq at totalverticalmargin@xborder - 0.1pt
+%
+        \ifsseq at rangecheck@sideways
+            % Swap availability measurements
+            \sseq at tempdimen=\sseq at tempxdimen
+            \sseq at tempxdimen=\sseq at tempydimen
+            \sseq at tempydimen=\sseq at tempdimen
+        \fi
+%
+        % \showthe\dimexpr\dimexpr \sseq at tempxdimen - \sseq at xscale cm * (\sseq at xmax-\sseq at xmin)\relax
+        % Compare space available to range * scale.
+        \ifdim \sseq at tempxdimen < \dimexpr \sseq at xscale cm * (\sseq at xmax-\sseq at xmin)\relax
+            % this will divide by zero if somehow we overflow the space on page
+            % while the range is 0. Hopefully no one will ever manage that.
+            \pgfmathparse{\sseq at tempxdimen/1cm/(\sseq at xmax-\sseq at xmin)} % max x range
+            \sseq at tempx = \numexpr \sseq at tempxdimen /\sseq at xscalecm \relax % max xscale
+            \sseq at error@xxxx{range-overflow}{x}
+                {from \sseq at xmin\space to \sseq at xmax\space (xmax - xmin = \the\numexpr\sseq at xmax-\sseq at xmin)}
+                {\the\sseq at tempx}% max x range
+                {\pgfmathresult}% max xscale
+            %\@xp\sseq at break
+        \fi
+%
+        \relax % Not sure why we need this...
+%
+        % \showthe\dimexpr\dimexpr \sseq at tempydimen - \sseq at yscale cm * (\sseq at ymax-\sseq at ymin)\relax
+        \ifdim \sseq at tempydimen < \dimexpr \sseq at yscale cm * (\sseq at ymax-\sseq at ymin)\relax
+            \sseq at tempy = \numexpr \sseq at tempydimen /\sseq at yscalecm \relax % max y range
+            \pgfmathparse{\sseq at tempydimen/1cm/(\sseq at ymax-\sseq at ymin)} % max yscale
+            \sseq at error@xxxx{range-overflow}{y}
+                {from \sseq at ymin\space to \sseq at ymax\space (ymax - ymin = \the\numexpr\sseq at ymax-\sseq at ymin)}
+                {\the\sseq at tempy}% max y range
+                {\pgfmathresult} % max yscale
+            %\@xp\sseq at break
+        \fi
     \fi
 %
     % Really this could be anything between -\sseq at xmin and -\sseq at xmax and it wouldn't matter. We'll split the difference.
@@ -267,6 +310,12 @@
     \sseq at yoffset=\numexpr\sseq at intdivceiling{\numexpr-\sseq at ymin-\sseq at ymax\relax}{\numexpr4*\sseq at ygridstep\relax}*(2*\sseq at ygridstep)\relax
 %
 %
+    \def\sseq at temp{\sseq at novalue}
+    \ifx\sseq at printpageas\sseq at temp
+        \def\sseq at printpageas{Page $2$ (all differentials)}%
+    \fi
+%
+%
     \tikzset{
         z=0pt,
         every path/.style={},
@@ -273,7 +322,6 @@
         every node/.style={}
     }
     \let\errmessage\sseq at errmessage@std
-    \sseq at setlayoutparameters
     \begin{tikzpicture}[/sseqpages/global/{default} options,\ifsseq at hasname/sseqpages/global/{\sseq at thename} options\fi,/sseqpages/global/{this page} options]%
     \sseq at sseqstyle@globalpart
     \sseq at globaldetonetransform
@@ -290,7 +338,7 @@
     % Axes labels only occur once per page, so the cost of typesetting them with tikz doesn't matter ... THANK GOD
     \ifx\sseq at title\pgfutil at empty\else
         \ifsseq at drawtitle
-            \sseq at eval{\@nx\path (0,-\sseq at yoffset) node[
+            \sseq at eval{\@nx\node[
                 /sseqpages/global/every title,
                 above=\sseq at topclippadding+5pt
                 ] {\unexpanded\expandafter{\sseq at title}};
@@ -376,6 +424,7 @@
     \let\sseq at class@drawnode\sseq at copypage@addclass
     \let\sseq at differential@object\@gobble
     \let\sseq at structline@draw\sseq at copypage@addstructline
+    \let\sseq at extension@draw\sseq at copypage@addextension
     \let\sseq at tikzpath@object\@gobble
     \let\sseq at pgfkeysdocommand\@gobbletwo
     \sseq at savedpaths
@@ -394,7 +443,11 @@
     \sseq at x@addto at macro\sseq at copymacro{\@nx\sseq at structline@copy{\sseq at thename}{#1}}
 }
 
+\def\sseq at copypage@addextension#1{
+    \sseq at x@addto at macro\sseq at copymacro{\@nx\sseq at extension@copy{\sseq at thename}{#1}}
+}
 
+
 %%% Scope
 \newcount\sseq at scope@savestackid
 \def\sseq at scope@secondpasstoks{}
@@ -478,6 +531,7 @@
 }
 
 
+
 %%%%%
 %%
 %% The main commands
@@ -583,7 +637,7 @@
         \sseq at obj@xdef{\classname.needstikz}{\sseq at needstikztrue}%
     \fi
     \@ifundefined{sseq at tempoffset}{}{%
-        \tikz at scan@one at point\sseq at setoffset\sseq at tempoffset
+        \@xp\tikz at scan@one at point\@xp\sseq at setoffset\sseq at tempoffset
     }%
     \ifx\sseq at tooltip\pgfutil at empty\else
         \sseq at obj@protectedxdef{\classname.tooltip}{\sseq at tooltip}
@@ -761,7 +815,7 @@
         \fi
         \@ifundefined{sseq at tempoffset}{}{
             \sseq at cleanup@obj{\classname.offset}
-            \tikz at scan@one at point\sseq at setoffset\sseq at tempoffset
+            \@xp\tikz at scan@one at point\@xp\sseq at setoffset\sseq at tempoffset
         }
     \ifnum\sseq at tempcount<\sseq at genmax\repeat
     \sseq at breakpoint
@@ -833,6 +887,7 @@
 }
 
 \def\sseq at replaceclassmain#1{
+    \sseq at pushstack@\coord
     \sseq at options@firstpassmode
     \the\sseq at sseqstyle
     \the\sseq at classstyle
@@ -844,20 +899,20 @@
     \sseq at processlabels
     \sseq at obj@ifundef{class.\coord.num}{\sseq at error@x{replaceclass-no-class}{\coordname}\sseq at break}{}
     \sseq at ifdead\coord{}{\sseq at error@x{replaceclass-not-dead-yet}{\coordname}\sseq at break}
+    \edef\oldclassname{class.\coord[\sseq at obj{class.\coord.num}]}
+%    \ifsseq at keepchanges\else
+%        \ifnum\the\numexpr\sseq at obj{\oldclassname.page}<\sseq at thepagecount\else
+%            \edef\sseq at temp{\sseq at obj{\oldclassname.page}}
+%            \sseq at error@xxx{replaceclass-no-effect-on-this-page}{\coord}{\sseq at temp}{\the\numexpr\sseq at temp+\@ne}% warning
+%            \sseq at breakfifi
+%        \fi
+%    \fi
 %
-    \edef\oldclassname{class.\coord[\sseq at obj{class.\coord.num}]}
     \sseq at cleanup@obj{class.\coord.num}
     \sseq at obj@inc{class.\coord.num}
     \edef\classname{class.\coord[\sseq at obj{class.\coord.num}]}
+    %\show\classname
 %
-    \ifsseq at keepchanges\else
-        \ifnum\the\numexpr\sseq at obj{\oldclassname.page}<\sseq at thepagecount\else
-            \edef\sseq at temp{\sseq at obj{\oldclassname.page}}
-            \sseq at error@xxx{replaceclass-no-effect-on-this-page}{\coord}{\sseq at temp}{\the\numexpr\sseq at temp+\@ne}% warning
-            \sseq at breakfifi
-        \fi
-    \fi
-%
     \let\partialcoord\coord at partial
     \ifx\sseq at class@tag\pgfutil at empty\else
         \sseq at obj@ifdef{partcoord.(\partialcoord).tag.\sseq at class@tagprefix\sseq at class@tag}{%
@@ -908,11 +963,44 @@
     \ifsseq at needstikz
         \sseq at obj@xdef{\classname.needstikz}{\sseq at needstikztrue}
     \fi
-    \@ifundefined{sseq at tempoffset}{}{\tikz at scan@one at point\sseq at setoffset\sseq at tempoffset}
+    \@ifundefined{sseq at tempoffset}{}{\@xp\tikz at scan@one at point\@xp\sseq at setoffset\sseq at tempoffset}
 %
     \sseq at breakpoint
     \endgroup
 }
+
+\sseq at DeclareDocumentCommand\replacestructlines{od()}{%
+    \begingroup
+    \sseq at loadinputline
+    \sseq at xsetthiscall{\string\replaceclass\IfNoValueF{#1}{[\unexpanded{#1}]}\unexpanded{(#2)}}
+%
+    \IfNoValueTF{#2}{
+        \def\sseq at coord{\lastclass0}
+    }{
+        \def\sseq at coord{#2}
+    }
+    \sseq at parsecoord\coord{\sseq at coord}{coordinate passed to \string\replaceclass}%
+%
+    % TODO: error handling here...
+%
+    \edef\sseq at classnum{\sseq at obj{class.\coord.num}}%
+    \ifnum\sseq at classnum=0\relax
+        \sseq at error@x{replacestructlines-class-not-replaced}{\coordname}\sseq at breakfi
+    \fi
+    \edef\classname{class.\coord[\sseq at classnum]}%
+    %\show\classname
+    \edef\oldclassname{class.\coord[\the\numexpr\sseq at obj{class.\coord.num}-1]}%
+    \sseq at cleanup@obj{\classname.dependencies}%
+    \sseq at obj@gletobj{\classname.dependencies}{\oldclassname.dependencies}%
+    %\sseq at obj@show{\classname.dependencies}
+    \sseq at obj@map{\classname.dependencies}{
+        \sseq at cleanup@obj{##1.page}%
+        \sseq at obj@gletobj{##1.page}{##1.page.old}%
+    }
+    \sseq at breakpoint
+    \endgroup
+}
+
 \def\sseq at class@draw at ifpage#1{
     \bgroup
     \sseq at obj@pagetogen{#1}{\sseq at thepage} % sets \sseq at gen
@@ -1045,6 +1133,14 @@
 % #2 -- page
 % #3 -- source coordinate
 \def\sseq at d@d#1#2{%%
+    \sseq at obj@ifdef{class.\source.hasextension}{
+        \sseq at error@xxx{d-class-has-extension}{source}{\sourcename}{#2}
+        \sseq at break
+    }{}
+    \sseq at obj@ifdef{class.\target.hasextension}{
+        \sseq at error@xxx{d-class-has-extension}{target}{\targetname}{#2}
+        \sseq at break
+    }{}
     \sseq at d@setpageminrec{class.\source}{#2}{source}%  automatically handles \sseq at cleanup@obj
     \sseq at d@setpageminrec{class.\target}{#2}{target}
     %%% This is the last point we might break, so now the differential is good.
@@ -1076,7 +1172,7 @@
     \sseq at cleanup@obj{d.#2\source\target.familylist}
     \sseq at obj@xoaddto{d.#2\source\target.familylist}{\sseq at familylist}
     \sseq at cleanup@obj{d.#2\source\target.options}
-    \sseq at obj@xoaddto{d.#2\source\target.options}{\sseq at savedoptioncode}
+    \sseq at obj@xaddto{d.#2\source\target.options}{\ifsseq at needstikz\@nx\sseq at needstikztrue\fi\unexpanded\@xp{\sseq at savedoptioncode}}
 }
 
 % Some helper macros:
@@ -1089,6 +1185,8 @@
     \sseq at cleanup@obj{#1[\sseq at obj{#1.num}].deathline}
     \sseq at d@setpageclass{#1}{#2}{#3}
     \sseq at obj@map{#1[\sseq at obj{#1.num}].dependencies}{
+        %\def\temp{##1}\show\temp
+        %\sseq at obj@show{#1[\sseq at obj{#1.num}].dependencies}
         \sseq at d@setpagemin{##1}{#2} % automatically handles cleanup
     }
 }
@@ -1173,6 +1271,8 @@
     \ifnum\sseq at obj{#1.page}>#2\relax
 	\ifnum\sseq at obj{#1.pagemin}>#2\relax\else % prevent a d1 from getting rid of a structline that was supposed to start on page 5
 	        \sseq at cleanup@obj{#1.page}
+            \sseq at cleanup@obj{#1.page.old}
+            \sseq at obj@gletobj{#1.page.old}{#1.page}
 	        \sseq at obj@xdef{#1.page}{#2}
 	\fi
     \fi
@@ -1258,6 +1358,7 @@
     }%
     \sseq at parsecoord\source{\sourcename}{source of structure line}%
     \sseq at parsecoord\target{\targetname}{target of structure line}%
+    % Sort \xsource and \xtarget. This is to ensure that if a person adds
     \ifnum\xsource>\xtarget\relax
         \sseq at parsedcoords@swap\source\target
     \else
@@ -1270,8 +1371,8 @@
                         \sseq at parsedcoords@swap\source\target
                     \else
                         \ifnum\nsource=\ntarget\relax
-                            \sseq at error{structline-source-target-equal}%
-                            \@xp\sseq at break\romannumeral-`0
+                            \sseq at error@n{edge-source-target-equal}{\structline}%
+                            \sseq at fbreak
                         \fi
                     \fi
                 \fi
@@ -1278,6 +1379,7 @@
             \fi
         \fi
     \fi
+    \relax % stop fbreak
     \@ifundefined{sseq at structline@page}{%this is repeated in circleclasses
         \def\sseq at pagemin{0}
         \ifnum\sseq at obj{class.\source.num}>\z@
@@ -1462,6 +1564,152 @@
 \def\sseq at structline@draw#1{\sseq at eval{\@nx\sseq at drawedge\sseq at obj{#1.source}\sseq at obj{#1.target}{structline}{\@nx\sseq at obj{#1.options}}}}
 
 
+
+\sseq at DeclareDocumentCommand\extension{od()}{%
+    \begingroup
+    \sseq at loadinputline
+    \IfNoValueTF{#2}{
+        \sseq at extension@main{extension}{#1}{#2}{#2}
+    }{
+        \def\next{\sseq at extension@@{extension}{#1}{#2}}%
+        \@xptwo\next\sseq at trimleadingspaces
+    }
+}
+\sseq at DeclareDocumentCommand\extensionoptions{od()}{%
+    \begingroup
+    \sseq at loadinputline
+    \IfNoValueTF{#2}{
+        \sseq at structline@main{extensionoptions}{#1}{#2}{#2}
+    }{
+        \def\next{\sseq at extensionoptions@@{extensionoptions}{#1}{#2}}%
+        \@xptwo\next\sseq at trimleadingspaces
+    }
+}
+
+\sseq at DeclareDocumentCommandAs\sseq at extension@@\extension{mmmd()}{%
+    \sseq at extension@main{#1}{#2}{#3}{#4}
+}
+
+\sseq at DeclareDocumentCommandAs\sseq at extensionoptions@@\extensionoptions{mmmd()}{%
+    \sseq at extension@main{#1}{#2}{#3}{#4}
+}
+
+\def\sseq at extension@main#1#2#3#4{
+    \sseq at xsetthiscall{\string\extension\IfNoValueF{#2}{\unexpanded{[#2]}}\IfNoValueF{#3}{\unexpanded{(#3)}\IfNoValueF{#4}{\unexpanded{(#4)}}}}%
+    \def\sseq at edgetype{structline}
+    \sseq at options@firstpassmode
+    \the\sseq at sseqstyle
+    \the\sseq at edgestyle
+    \the\sseq at structlinestyle
+    \the\sseq at scope@toks
+    \sseq at options@normalmode
+    \IfNoValueF{#2}{%
+        \sseq at processoptions{extension}{#2}% Outputs result into \sseq at savedoptioncode
+    }%
+    \def\sourcename{#3}%
+    \def\targetname{#4}%
+    \IfNoValueTF{#3}{%
+        \def\sourcename{\lastclass1}%
+        \def\targetname{\lastclass}%
+    }{%
+        \IfNoValueT{#4}{%
+            \def\targetname{\lastclass}%
+        }%
+    }%
+    \sseq at parsecoord\source{\sourcename}{source of extension}%
+    \sseq at parsecoord\target{\targetname}{target of extension}%
+    \ifnum\xsource>\xtarget\relax
+        \sseq at parsedcoords@swap\source\target
+    \else
+        \ifnum\xsource=\xtarget\relax
+            \ifnum\ysource>\ytarget\relax
+                \sseq at parsedcoords@swap\source\target
+            \else
+                \ifnum\ysource=\ytarget\relax
+                    \ifnum\nsource>\ntarget\relax
+                        \sseq at parsedcoords@swap\source\target
+                    \else
+                        \ifnum\nsource=\ntarget\relax
+                            \sseq at error@n{edge-source-target-equal}{\extension}%
+                            \sseq at fbreak
+                        \fi
+                    \fi
+                \fi
+            \fi
+        \fi
+    \fi
+    \relax % stop fbreak
+    \csname sseq at extension@#1\endcsname
+    \sseq at breakpoint
+    \endgroup
+}
+\def\sseq at extension@extension{
+    \ifnum\sseq at obj{class.\source[\sseq at obj{class.\source.num}].page}<\sseq at infinity\relax
+        \sseq at error{extension-stillborn}
+        \sseq at breakfi
+    \fi
+    \ifnum\sseq at obj{class.\target[\sseq at obj{class.\target.num}].page}<\sseq at infinity\relax
+        \sseq at error{extension-stillborn}
+        \sseq at breakfi
+    \fi
+    \edef\sseq at extensionname{extension.\source\target}
+    \sseq at obj@ifdef{\sseq at extensionname.source}{%
+        \sseq at error@xx{extension-already-exists}{\sourcename}{\targetname}
+        \sseq at breakfi
+    }{
+        \sseq at savedpaths@addextension{extension.\source\target}
+    }
+    \sseq at cleanup@obj{class.\source.hasextension}
+    \sseq at obj@gdef{class.\source.hasextension}{}
+    \sseq at cleanup@obj{class.\target.hasextension}
+    \sseq at obj@gdef{class.\target.hasextension}{}
+    \sseq at cleanup@obj{\sseq at extensionname.source}
+    \sseq at obj@xdef{\sseq at extensionname.source}{\source}
+    \sseq at obj@xdef{\sseq at extensionname.target}{\target}
+    \sseq at obj@xodef{\sseq at extensionname.familylist}{\sseq at familylist}
+    \sseq at cleanup@obj{\sseq at extensionname.options}
+    \sseq at obj@xdef{\sseq at extensionname.options}{\ifsseq at needstikz\@nx\sseq at needstikztrue\fi\unexpanded\@xp{\sseq at savedoptioncode}}
+}
+\def\sseq at extension@extensionoptions{
+    \edef\sseq at extensionname{extension.\source\target}
+    \sseq at obj@ifundef{\sseq at extensionname.source}{
+        \sseq at error@n{cmdoptions-feature-doesn't-exist}{\extension}
+        \sseq at break
+    }{}
+    \sseq at cleanup@obj{\sseq at extensionname.options}
+    \sseq at cleanup@obj{\sseq at extensionname.familylist}
+    \ifsseq at needstikz
+        \sseq at obj@gaddto{\sseq at extensionname.options}{\sseq at needstikztrue}
+    \fi
+    \sseq at obj@xoaddto{\sseq at extensionname.options}{\sseq at savedoptioncode}
+    \sseq at obj@xoaddto{\sseq at extensionname.familylist}{\sseq at familylist}
+}
+
+\def\sseq at extension@copy#1#2{
+    \begingroup
+    \sseq at structline@copy at decomposename#2
+    \let\sseq at thename@saved\sseq at thename
+    \def\sseq at pagemin{0}
+    \sseq at parsecoord\source{\sourcename}{source of structure line}%
+    \sseq at parsecoord\target{\targetname}{target of structure line}
+    \def\sseq at thename{#1}
+    \sseq at lettoobj\sseq at familylist{#2.familylist}
+    \sseq at lettoobj\sseq at savedoptioncode{#2.options}
+    \let\sseq at thename\sseq at thename@saved
+    \sseq at extension@extension
+    \endgroup
+}
+
+
+\def\sseq at extension@draw at ifpage#1{
+    \bgroup
+    \ifnum\sseq at thepage=\sseq at infinity\relax
+        \sseq at extension@draw{#1}
+    \fi
+    \egroup
+}
+\def\sseq at extension@draw#1{\sseq at eval{\@nx\sseq at drawedge\sseq at obj{#1.source}\sseq at obj{#1.target}{structline}{\@nx\sseq at obj{#1.options}}}}
+
 %% This is a dumb place to put this. It has to be after the differential commands are defined.
 \ifsseq at draftmode % Okay, have to dummy out all the main commands.
     % Only add tikz background paths to the savedpaths. We need to draw background paths because they might change the bounding box!
@@ -1515,12 +1763,30 @@
     \sseq at DeclareDocumentCommand\replacesource{o}{}
     \sseq at DeclareDocumentCommand\replacetarget{o}{}
     \def\sseq at d@main#1#2#3#4#5{}
-    \DeclareDocumentCommand \sseq at DrawIfValidDifferential@@ { d() d() } {}
+    \DeclareDocumentCommand \sseq at DrawIfValidDifferential@ { mmO{} } {
+        \sseq at loadinputline
+        \def\sseq at dtype{d}
+        \def\sseq at trueclause{#1}
+        \def\sseq at falseclause{#2}
+        \sseq at d@grabpage\sseq at DrawIfValidDifferential@@
+    }
+    \DeclareDocumentCommand \sseq at DrawIfValidDifferential@@ { d() d() } {
+        \csname sseq at DrawIfValidDifferential@@handle at truefalse%
+            @@\sseq at trueclause\sseq at falseclause
+        \endcsname
+    }
+    % Have to do something in case it branches. We somewhat arbitrarily always
+    % pretend it branched yes.
+    \def\sseq at DrawIfValidDifferential@@handle at truefalse@@{}
+    \def\sseq at DrawIfValidDifferential@@handle at truefalse@@T{\@firstofone}
+    \def\sseq at DrawIfValidDifferential@@handle at truefalse@@F{\@gobble}
+    \def\sseq at DrawIfValidDifferential@@handle at truefalse@@TF{\@firstoftwo}
+
     \sseq at DeclareDocumentCommand\structline{od()d()}{}
     \sseq at DeclareDocumentCommand\structlineoptions{od()d()}{}
     \sseq at DeclareDocumentCommand\circleclasses{or()r()}{}
     \sseq at DeclareDocumentCommand\gettag{mr()}{}
-    \endinput
+    \expandafter\endinput
 \fi
 
 

Modified: trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqmessages.code.tex
===================================================================
--- trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqmessages.code.tex	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqmessages.code.tex	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2 2017-09-16 2017-09-16
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% File: sseqmessages.code.tex
@@ -275,7 +275,7 @@
 \def\sseq at error@xxxx{\msg_error:nnxxxx{spectralsequences}}
 \def\sseq at warning   {\msg_warning:nn{spectralsequences}}
 
-\def\sseq at newerror#1#2{\msg_new:nnn{spectralsequences}{#1}{#2}}
+\def\sseq at newerror#1#2{\msg_new:nnn{spectralsequences}{#1}{#2\sseq at errorinfo}}
 \def\sseq at newerror@internal#1#2{\msg_new:nnn{spectralsequences}{#1}{Internal error: #2 \sseq at contactpackageauthor}}
 \edef\sseq at contactpackageauthor{Contact package author \sseq at authorname\space at \sseq at authoremail.}
 
@@ -285,6 +285,7 @@
 \cs_new_eq:NN \__sseq_hooked_msg_error_code:nnnnnn   \__msg_error_code:nnnnnn
 \cs_new_eq:NN \__sseq_hooked_msg_warning_code:nnnnnn \__msg_warning_code:nnnnnn
 \cs_new_eq:NN \__sseq_hooked_msg_info_code:nnnnnn    \__msg_info_code:nnnnnn
+\cs_new_eq:NN \__sseq_hooked_interupt_wrap:nnn \__msg_interrupt_wrap:nnn
 
 
 \cs_new:Npn \sseq at installmsghooks {%
@@ -294,12 +295,13 @@
     \cs_set_eq:NN \__msg_error_code:nnnnnn      \__sseq_hooked_msg_error_code:nnnnnn
     \cs_set_eq:NN \__msg_warning_code:nnnnnn    \__sseq_hooked_msg_warning_code:nnnnnn
     \cs_set_eq:NN \__msg_info_code:nnnnnn       \__sseq_hooked_msg_info_code:nnnnnn
+    \cs_set_eq:NN \__msg_interrupt_wrap:nnn       \__sseq_hooked_interupt_wrap:nnn
 }
 
 \sseq at newerror@internal{msg-patch-failed}{Failed to patch the latex 3 message system. The errors will not be as expressive.}
 
 \def\sseq at msgpatchfailed{
-    \msg_error:nn{spectralsequences}{msg-patch-failed}
+    \msg_warning:nn{spectralsequences}{msg-patch-failed}
     \def\sseq at installmsghooks{}
     \sseq at break
 }
@@ -310,7 +312,6 @@
 \pretocmd\__sseq_hooked_msg_see_documentation_text:n{\sseq at errorinfo}{}{\sseq at msgpatchfailed}
 
 
-
 \pretocmd\__sseq_hooked_msg_fatal_code:nnnnnn  {\sseq at error@setup}  {}{\sseq at msgpatchfailed}
 \pretocmd\__sseq_hooked_msg_error_code:nnnnnn  {\sseq at error@setup}  {}{\sseq at msgpatchfailed}
 %\pretocmd\__sseq_hooked_msg_warning_code:nnnnnn{\sseq at msg@setup}  {}{\sseq at msgpatchfailed}
@@ -319,6 +320,7 @@
 \apptocmd\__sseq_hooked_msg_error_code:nnnnnn  {\sseq at error@cleanup}{}{\sseq at msgpatchfailed}
 %\apptocmd\__sseq_hooked_msg_warning_code:nnnnnn{\sseq at error@cleanup}{}{\sseq at msgpatchfailed}
 %\apptocmd\__sseq_hooked_msg_info_code:nnnnnn   {\sseq at error@cleanup}{}{\sseq at msgpatchfailed}
+\patchcmd \__sseq_hooked_interupt_wrap:nnn {\str_count:N\l__msg_text_str-\str_count:N\l__msg_name_str +2} {2} {}{\sseq at msgpatchfailed}
 
 \sseq at breakpoint
 
@@ -355,7 +357,6 @@
 
 \sseq at newerror@internal{expl3-incompatibility}{Since this version of spectralsequences, the expl3 definition of #1 was updated in an incompatible way.}
 
-
 \sseq at newerror@internal{this-shouldnt-happen}{This branch of the code should be unreachable. Something really weird has happened. Error occurred in #1.}
 
 % Convexity thing
@@ -377,7 +378,7 @@
 %%
 %%
 \sseq at newerror@internal{U-xparse-incompatible}{The 'U' argument type is incompatible with the current version of xparse.}
-\sseq at newerror{won't-override-builtin}{Macro '#1' is a spectralsequences builtin and I won't override it. Try a different name.}
+\sseq at newerror{wont-override-builtin}{Macro '#1' is a spectralsequences built in and I won't override it. Try a different name.}
 \sseq at newerror{usermacro-not-free}{Macro '#1' has already been defined using \string\DeclareSseqCommand, \string\NewSseqCommand, \string\DeclareSseqGroup, or \string\NewSseqGroup. I am overriding it. If this is what you intended, you should either use \@nx\DeclareSseqGroup or \string\DeclareSseqCommand, which won't complain.}
 
 \sseq at newerror{macro-patch-failed}{Failed to patch macro '#1'. This is probably some annoying catcode issue. Try \@nx\tracingpatches to see more information about why the patch failed.}
@@ -389,9 +390,10 @@
 %%
 %%
 \sseq at newerror{classpattern-already-defined}{Class pattern '#1' already defined. Overwriting it.}
+\sseq at newerror{classpattern-invalid-math-expression}{Expression '#1' encountered in class pattern definition is not a valid math expression. Skipping the definition.}
 \sseq at newerror{classpattern-unexpected-token}{Unexpected token '#1' in class pattern definition. Skipping the definition.}
 \sseq at newerror{classpattern-missing-tokens}{Incomplete class pattern definition. Skipping the definition.}
-\sseq at newerror{classpattern-extra-coord-ignored}{Extra coordinate '#1' ignored. You probably forgot a semicolon.}
+\sseq at newerror{classpattern-extra-coord-ignored}{Extra coordinate '#1' ignored in row #2. You probably forgot a semicolon.}
 \sseq at newerror{classpattern-too-few-coords}{Too few coordinates in row #1.}
 
 \sseq at newerror{classpattern-too-many-classes}{%
@@ -406,11 +408,12 @@
 \sseq at newerror{class-no-tag}{The class #1 has no tag so I cannot get it.}
 
 \sseq at newerror{class-extra-coords}{Too many coordinates. Ignoring the extra ones.}
-\sseq at newerror{named-coordinate-class}{You can't pass a named coordinate to \string\class.} % Probably not actually possible to obtain this error
+\sseq at newerror{named-coordinate-class}{You can't pass a named coordinate to \string\class.}
+
 \sseq at newerror{d-no-degree}{%
-    You must specify the degree of your spectral sequence if you want to use the differential command \string\d.
+    If you want to use the differential command \string\d\ you must either specify the grading of the differential or explicitly provide a target coordinate for the differential.
     Specify the degree by providing 'degree={f(\#1)}{g(\#1)}' as an option to '\string\begin{sseqdata}',
-    where f(\#1) and g(\#1) are formulas for the x and y degree of the \#1th page differential.%
+    where f(\#1) and g(\#1) are formulas for the x and y degree of the \#1th page differential. Alternatively, you may say e.g., '\string\d2(source)(target)'%
 }
 \sseq at newerror{d-named-coord-two-indexes}{You provided a named class and two indexes, but the named class already comes with an index so you can only provide one more for the target. Ignoring the second index.}% should be a warning
 \sseq at newerror{d-target-index-target-coord}{You provided both a target index and a target coordinate, but this overdetermines the differential. Ignoring the target index.}
@@ -461,7 +464,7 @@
     or '\string\begin{sseqpage}[#1\sseq at possiblecurrentvaluemean]').%
 }
 
-% Applies to name and page, and saying "sseqs={name=somename}" is just a bad idea.
+% Applies to name and page. Saying "sseqs={name=somename}" is a bad idea.
 \sseq at newerror{option-no-default-allowed}{%
     You cannot set a default value for '#1'.% Try \@nx\sseqset{sseqs={#1\ifx\pgfkeyscurrentvalue\pgfkeysnovalue at text\else=\pgfkeyscurrentvalue\fi}}.%
 }
@@ -550,14 +553,15 @@
 
 \sseq at newerror{replaceclass-not-dead-yet}{I cannot replace the class at #1 because it seems to be alive and well.}
 \sseq at newerror{replaceclass-no-effect-on-this-page}{The class at #1 died on page #2 so replacing it only affects pages after #3, but the current page is \sseq at thepage.} % warning
+\sseq at newerror{replacestructlines-class-not-replaced}{I cannot replace the structlines on #1 because it has not been replaced.}
 
 
-
 \sseq at newerror{d-invalid-page}{Invalid page '#1'.}
 \sseq at newerror{d-class-already-hit}{% #1 <-#3, #2 <-\csname #3name\endcsname, #3 <- #2, #4 <- \unexpanded\@xpthree{\sseq at obj{\sseq at temp.deathinfo}}
     The #1 #2 of differential \sseq at thiscall\ on page #3 has already been the #4.
     Use \string\replaceclass#2 before \sseq at thiscall.%
 }
+\sseq at newerror{d-class-has-extension}{The #1 #2 of differential \sseq at thiscall\ on page #3 has already been involved in an extension. If you are planning to replace it, move the \string\extension\ after the call to \string\replaceclass.}
 \sseq at newerror{d-hit-same-page-replaceclass}{%#1 <- #3, #2 <- \csname #3name\endcsname, #3 <- #2, #3 <-\sseq at obj{#1[\the\sseq at tempcount].deathinfo},
     The #1 #2 of differential \sseq at thiscall\ was the #3.
     If multiple differentials touch a class on the same page, they cannot be separated by a \@nx\replaceclass command.%
@@ -570,8 +574,9 @@
 
 \sseq at newerror{structline-no-page-max}{You cannot provide \@nx\structline with the option "page=min--max", only with "page=min".} %warning
 \sseq at newerror{structline-already-exists}{Cannot add a structline from #1 to #2 because such a structline already exists.}
-\sseq at newerror{structline-stillborn}{Structline dies before it is born. Perhaps you meant to specify a different source or target?}
-\sseq at newerror{structline-source-target-equal}{The source and target of a \@nx\structline cannot be equal.}
+\sseq at newerror{structline-stillborn}{#1 dies before it is born. Perhaps you meant to specify a different source or target?}
+\sseq at newerror{extension-stillborn}{Either the source or target of extension is not currently alive. Perhaps you meant to specify a different source or target? Perhaps you forgot a call to \@nx\replaceclass?}
+\sseq at newerror{edge-source-target-equal}{The source and target of a #1 cannot be equal.}
 
 
 \protected\def\sseq at quiet{\msg_redirect_module:nnn{spectralsequences}{error}{info}}

Modified: trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqparsers.code.tex
===================================================================
--- trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqparsers.code.tex	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/texmf-dist/tex/latex/spectralsequences/sseqparsers.code.tex	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1,8 +1,8 @@
 %%
-%% Package: spectralsequences v1.2.2 2017-09-16 2017-09-16
+%% Package: spectralsequences v1.3.0 2021-07-18
 %% Author: Hood Chatham
 %% Email: hood at mit.edu
-%% Date: 2019-02-18
+%% Date: 2021-07-18
 %% License: Latex Project Public License
 %%
 %% File: sseqparsers.code.tex
@@ -38,7 +38,16 @@
 
 % Prevent \protect from causing trouble for \pgfmathparse
 \let\sseq at pgfmathparse@orig\pgfmathparse
-\protected\def\sseq at pgfmathparse#1{\let\@@protect\protect\def\protect{}\sseq at pgfmathparse@orig{#1}\restore at protect}
+\protected\def\sseq at pgfmathparse#1{%
+    \bgroup
+    \let\@@protect\protect
+    \def\protect{}%
+    \let\pgfmath at protected@edef\edef
+    \sseq at pgfmathparse@orig{#1}%
+    \restore at protect
+    \sseq at smuggle@macro\pgfmathresult
+    \egroup
+}
 
 
 %%% ifpgfmathexpr
@@ -344,7 +353,7 @@
 \newcount\sseq at cp@row
 \newcount\sseq at cp@n
 
-\def\sseqnewclasspattern#1#2{
+\def\SseqNewClassPattern#1#2{
     \ifcsname sseq@#1xoffset1/1\endcsname\sseq at error@n{classpattern-already-defined}{#1}\fi % could be a warning
     \begingroup
     \def\sseq at name{#1}
@@ -355,6 +364,7 @@
     \let\next\sseq at newclasspattern@
     \sseq at newclasspattern@#2\sseq at nil
 }
+\let\sseqnewclasspattern\SseqNewClassPattern
 
 \def\sseq at newclasspattern@{
     \@ifnextchar\bgroup{\sseq at error@n{classpattern-unexpected-token}{\{}}{\sseq at newclasspattern@processstate}
@@ -371,7 +381,7 @@
             \def\sseq at temp{}
             \def\sseq at state{ycoord}
         }{
-            \sseq at error{classpattern-not-integer-expression}
+            \sseq at error@x{classpattern-invalid-math-expression}{\sseq at temp}
             \let\next\sseq at newclasspattern@abort
         }
     \else
@@ -391,9 +401,9 @@
             \let\sseq at tempy\sseq at mathresult
             \def\sseq at temp{}
             \def\sseq at state{nocoord}
-            \advance\sseq at cp@n\@ne
+            \advance\sseq at cp@n1\relax
             \ifnum\sseq at cp@n>\sseq at cp@row\relax
-                \sseq at error@x{classpattern-extra-coord-ignored}{(\sseq at tempx,\sseq at tempy)}
+                \sseq at error@xx{classpattern-extra-coord-ignored}{(\sseq at tempx,\sseq at tempy)}{\the\sseq at cp@row}
             \else
                 \sseq at e@addto at macro\sseq at newclasspattern@dodefs{
                     \def\@xp\@nx\csname sseq@\sseq at name xoffset\the\sseq at cp@n/\the\sseq at cp@row\endcsname{\sseq at tempx}
@@ -401,7 +411,7 @@
                 }
             \fi
         }{
-            \sseq at error{classpattern-not-integer-expression}
+            \sseq at error@x{classpattern-invalid-math-expression}{\sseq at temp}
             \let\next\sseq at newclasspattern@abort
         }
     \else
@@ -420,12 +430,12 @@
         \def\sseq at state{xcoord}
     \else
         \ifx#1;
-            \ifnum\sseq at cp@n=\sseq at cp@row\relax
+            \ifnum\sseq at cp@n<\sseq at cp@row\relax
+                \sseq at error@x{classpattern-too-few-coords}{\the\sseq at cp@row}
+                \let\next\sseq at newclasspattern@abort
+            \else
                 \advance\sseq at cp@row\@ne
                 \sseq at cp@n=\z@
-            \else
-                \sseq at error@x{classpattern-too-few-coords}{\the\sseq at cp@row}
-                \let\next\sseq at newclasspattern@abort
             \fi
         \else
             \ifx#1\sseq at nil
@@ -480,7 +490,7 @@
 %   \sseq at parsecoord@maincoord -- separates a coordinate into {x,y}{n or tag}, numerically evaluates x and y, and adds in the values of \sseq at x and \sseq at y
 %   \sseq at parsecoord@index -- decides which class {n or tag} represents
 %
-% There are three interface commands:
+% There are several interface commands:
 %    \sseq at parsecoord   -- for most things
 %    \sseq at cparsecoord  -- for \class (but not for \replaceclass or \classoptions). Doesn't use \sseq at parsecoord@index at all.
 %    \sseq at dparsecoord  -- for \d and \doptions
@@ -487,6 +497,7 @@
 %    \sseq at parsecoordex -- for \isalive: the body of a page constraint needs to be \edef'd so we need a completely expandable version.
 %      The expandable version doesn't have any error checking -- to get the error checking, we pass the coordinates once through the unexpandable version
 %      inside of an hbox.
+%    \sseq at parsecoord@allownonexisting -- doesn't raise an error if the class doesn't exist.
 
 \def\sseq at errortype{}
 \def\sseq at printerrortype#1{\@xp\sseq at ifempty\@xp{\sseq at errortype}{}{#1 \sseq at errortype}}
@@ -577,10 +588,14 @@
 \def\sseq at errortype@tikzprim{tikz ~ primitive}% This is sort of a silly hack, but this first error check shouldn't happen in a tikz primitive.
 \def\sseq at parsecoord@index{%
     \sseq at obj@ifundef{partcoord.(\sseq at xycoord).numnodes}{
-        \ifx\sseq at errortype\sseq at errortype@tikzprim
-            \def\sseq at index{}%  Communicates to \sseq at tikzprimitives@coords at maybeclass that this is not a class
+        \ifsseq at parsecoord@allownonexisting
+            \ifx\sseq at rawindex\pgfutil at empty
+                \def\sseq at index{} %  Communicates to \sseq at tikzprimitives@coords at maybeclass that this is not a class
+            \else
+                \sseq at error@x{no-classes}{(\sseq at xycoord)} \sseq at fbreak
+            \fi
         \else
-            \sseq at error@x{no-classes}{(\sseq at xycoord)}\@xp\sseq at break
+            \sseq at error@x{no-classes}{(\sseq at xycoord)} \sseq at fbreak
         \fi
     }{
         \ifx\sseq at rawindex\pgfutil at empty
@@ -595,14 +610,16 @@
                         \edef\sseq at index{\the\numexpr\sseq at obj{partcoord.(\sseq at xycoord).numnodes} + \sseq at rawindex + \@ne\relax}%
                         \ifnum\sseq at index<\@ne
                             \sseq at error@xxx{index-too-large}{\sseq at rawindex}{\sseq at obj{partcoord.(\sseq at xycoord).numnodes}}{(\sseq at xycoord)}%
-                            \edef\sseq at index{1}% or maybe I should break?
+                            \edef\sseq at index{1}
+                            \sseq at fbreak
                         \fi
                     \else
+                        \edef\sseq at index{\the\numexpr\sseq at rawindex}
                         \ifnum\sseq at rawindexeval>\sseq at obj{partcoord.(\sseq at xycoord).numnodes}\relax
                             \sseq at error@xxx{index-too-large}{\sseq at rawindex}{\sseq at obj{partcoord.(\sseq at xycoord).numnodes}}{(\sseq at xycoord)}%
-                            \edef\sseq at rawindex{\sseq at obj{partcoord.(\sseq at xycoord).numnodes}}% or maybe I should break?
+                            \edef\sseq at rawindex{\sseq at obj{partcoord.(\sseq at xycoord).numnodes}}
+                            \sseq at fbreak
                         \fi
-                        \edef\sseq at index{\the\numexpr\sseq at rawindex}
                     \fi
                 }{
                     \sseq at error@xx{undefined-tag}{\sseq at rawindex}{(\sseq at xycoord)}%
@@ -621,7 +638,7 @@
     \def\sseq at index{}%
     \def\sseq at errortype{#3}%
     \sseq at parsecoord@maincoord{#2}%
-    \let\sseq at rawindex\sseq at restcoord
+    \exp_args:NNf\def\sseq at rawindex{\exp_args:No\sseq at trimspaces{\sseq at restcoord}}
     \ifx\sseq at index\pgfutil at empty
         \@xp\sseq at parsecoord@index
     \fi
@@ -628,6 +645,14 @@
     \sseq at parsecoord@setupvariables{#1}{#2}
 }
 
+\newif\ifsseq at parsecoord@allownonexisting
+\def\sseq at parsecoord@allownonexisting#1#2#3{%
+    \sseq at parsecoord@allownonexistingtrue
+    \sseq at parsecoord{#1}{#2}{#3}
+    \sseq at parsecoord@allownonexistingfalse
+}
+
+
 \def\sseq at parsecoord@setupvariables#1#2{
     % TODO: clean this up a bit? it's pretty ad-hoc.
     % Whenever you update this, make sure to update sseq at paredcoords@swap below too.
@@ -807,11 +832,26 @@
 
 \def\sseq at parsecoordex{\exp_last_unbraced:NNNf\sseq at parsecoordex@}
 \def\sseq at parsecoordex@#1(#2){\sseq at parsecoordex@@#1#2,\@nil}
+
+% Older versions of etex don't provide \expanded so need more expensive version of \exp_args:NNof.
+\ifx\expanded\undefined
+    \cs_set:Npn\exp_args:NNof { \::N \::o \::f \::: }
+\else
+    \cs_set:Npn\exp_args:NNof #1#2#3#4 {
+        \expanded {
+            \exp_not:N #1
+            \exp_not:N #2
+            { \unexpanded \expandafter { #3 } }
+            { \unexpanded  \expandafter { \exp:w \exp_end_continue_f:w #4} }
+        }
+    }
+\fi
+
 \def\sseq at parsecoordex@@#1#2,#3,#4\@nil{
     \ifx&#4&
-        \exp_last_unbraced:NNo\sseq at parsecoord@indexex#1(\the\numexpr#2\@xp,\the\numexpr#3,1)
+        \exp_args:NNo\sseq at parsecoord@indexex#1{\the\numexpr#2\@xp,\the\numexpr#3}{1}
     \else
-        \exp_args:NNo\sseq at parsecoord@indexex#1{\the\numexpr#2\@xp,\the\numexpr#3\@xp\relax\@xp}\@xp{\sseq at removecomma#4\sseq at nil}
+        \exp_args:NNof\sseq at parsecoord@indexex#1{\the\numexpr#2\@xp,\the\numexpr#3\@xp\relax}{\exp_args:Nf\sseq at trimspaces{\sseq at removecomma#4\sseq at nil}}
     \fi
 }
 
@@ -863,8 +903,9 @@
 
 \protected\def\sseq at pushstack(#1){
     \bgroup
-    \sseq at parsecoord\temp{#1}{}
+    \sseq at parsecoord@allownonexisting\temp{#1}{}
     \sseq at pushstack@\temp
+    \sseq at breakpoint
     \egroup
 }
 
@@ -872,6 +913,7 @@
 \def\sseq at pushstack@{\@xp\sseq at pushstack@@}
 
 \def\sseq at pushstack@@(#1,#2,#3){
+    %\def\temp{#1,#2,#3}\show\temp
     \global\advance\sseq at stackdepth\@ne
     \@xp\gdef\csname sseq.\sseq at thename.stack.\the\sseq at stackdepth.lastx\endcsname{#1}
     \@xp\gdef\csname sseq.\sseq at thename.stack.\the\sseq at stackdepth.lasty\endcsname{#2}
@@ -1000,7 +1042,7 @@
     \sseq at parsecoord\coord{#1}{}
     \@gobbletwo\sseq at breakpoint\sseq at tempiffalse % this executes \sseq at tempiffalse if we broke, otherwise it gets gobbled
     \ifsseq at tempif
-        \sseq_if_out_of_bounds_noparse:nnTF { \xcoord } { \ycoord }{\egroup\prg_return_true:}{\egroup\prg_return_false:}
+        \sseq_if_out_of_bounds_inner:nnTF { \xcoord } { \ycoord }{\egroup\prg_return_true:}{\egroup\prg_return_false:}
     \else
         \egroup
         \prg_return_false:
@@ -1008,18 +1050,26 @@
 }
 
 % For internal use b/c it's faster not to call \sseq at parsecoord
+% Make sure to add \sseq at x and \sseq at y to the coordinate before passing along
+% to if_out_of_bounds_inner to correctly account for translations.
 \prg_new_conditional:Npnn \sseq_if_out_of_bounds_noparse:nn #1#2 {TF} {
-    \sseq at tempiftrue
-    \ifnum#1<\sseq at xmaxpp\relax\ifnum#1>\sseq at xminmm\relax\ifnum#2<\sseq at ymaxpp\relax\ifnum#2>\sseq at yminmm\relax
-        \sseq at tempiffalse
-    \fi\fi\fi\fi
-    \ifsseq at tempif
-        \prg_return_true:
-    \else
-        \prg_return_false:
-    \fi
+    \sseq_if_out_of_bounds_inner:nnTF { #1 + \sseq at x } { #2 + \sseq at y }
+        { \prg_return_true: }
+        { \prg_return_false: }
 }
 
+
+\prg_new_conditional:Npnn \sseq_if_out_of_bounds_inner:nn #1#2 {TF} {
+    \bool_lazy_all:nTF {
+        { \int_compare_p:nNn { #1 } < { \sseq at xmaxpp } }
+        { \int_compare_p:nNn { #1 } > { \sseq at xminmm } }
+        { \int_compare_p:nNn { #2 } < { \sseq at ymaxpp } }
+        { \int_compare_p:nNn { #2 } > { \sseq at yminmm } }
+    }
+        { \prg_return_false: }
+        { \prg_return_true: }
+}
+
 \prg_new_conditional:Npnn \sseq_if_alive:nn #1 #2 { T, F, TF } {
     \bgroup
     \sseq at tempiftrue
@@ -1178,6 +1228,9 @@
     \futurelet\testtok\sseq at defer@tikzcommand@@
 }
 
+% This serves as a marker to break out of parser.
+% TODO: support \pgfextra? Should we pass \pgfextra along to be handled by tikz parser?
+\def\sseq at defer@tikzcommand at escape{sseq at defer@tikzcommand at escape}
 \def\sseq at defer@tikzcommand@@{%
     \ifx\testtok;
         \let\next\sseq at defer@tikzcommand at finish
@@ -1191,10 +1244,19 @@
                 \@xp\ifx\space\testtok
                     \let\next\sseq at defer@tikzcommand at space
                 \else
-                    \ifx\testtok\bgroup
-                        \let\next\sseq at defer@tikzcommand at group
+                    % TODO: also support "foreach" keyword without the backslash.
+                    \ifx\testtok\foreach
+                        \let\next\sseq at defer@tikzcommand at foreach
                     \else
-                        \let\next\sseq at defer@tikzcommand at other
+                        \ifx\testtok\sseq at defer@tikzcommand at escape % escape is like \pgfextra, breaks out of the parsing.
+                            \let\next\@gobble
+                        \else
+                            \ifx\testtok\bgroup
+                                \let\next\sseq at defer@tikzcommand at group
+                            \else
+                                \let\next\sseq at defer@tikzcommand at other
+                            \fi
+                        \fi
                     \fi
                 \fi
             \fi
@@ -1204,6 +1266,12 @@
 }
 
 
+\def\sseq at defer@tikzcommand at foreach{
+    \def\pgffor at beginhook{\expandafter\sseq at defer@tikzcommand@\pgfutil at firstofone}
+    \def\pgffor at endhook{\sseq at defer@tikzcommand at escape}
+    \def\pgffor at afterhook{\sseq at defer@tikzcommand@}
+}
+
 \def\sseq at defer@tikzcommand at option[#1]{%
     \sseq at processoptions{tikz ~ primitives}{#1}%
     \ifx\sseq at savedoptioncode\pgfutil at empty\else
@@ -1301,8 +1369,10 @@
 % If the expression was incomplete, we'll jump here to avoid adding the semicolon to the error printout
 \def\sseq at defer@tikzcommand at finish@{
     \sseq at g@addto at macro\sseq at thepathsofar{;}
+    %\show\sseq at thepathsofar
     \global\sseq at thiscalltoks\@xp{\sseq at whattheusersaid}
     \ifx\sseq at pageconstraint\sseq at pageconstraint@true
+        %\show\sseq at thepathsofar
         \sseq at savedpaths@xaddtikzpath{\unexpanded\@xp{\sseq at thepathsofar}}%
     \else
         \sseq at savedpaths@xaddtikzpath{%
@@ -1371,7 +1441,7 @@
                     \fi
                     \ifsseq at tempif
                         \@xp\sseq at tikzprimitives@ifintcoords\@xp{\sseq at tempcoord}{ % check we're all integer coordinates
-                            \sseq at parsecoord\coord{\sseq at tempcoord}{tikz ~ primitive}%
+                            \sseq at parsecoord@allownonexisting\coord{\sseq at tempcoord}{tikz ~ primitive}%
                             \ifx\sseq at index\pgfutil at empty\else
                                 \sseq at x@addto at macro\sseq at thepathsofar{(sseq{\sseq at removeparens\coord}\sseq at tempanchor)}% Okay, we're all set, it's a class
                                 \let\next\@gobble % don't run \sseq at tikzprimitives@notaclass

Modified: trunk/Master/tlpkg/libexec/ctan2tds
===================================================================
--- trunk/Master/tlpkg/libexec/ctan2tds	2021-07-19 20:13:07 UTC (rev 59991)
+++ trunk/Master/tlpkg/libexec/ctan2tds	2021-07-19 20:15:07 UTC (rev 59992)
@@ -1543,6 +1543,7 @@
  'pmx'			=> '&PREHOOK_pmx',
  'prosper'              => '&PREHOOK_prosper',
  'skb'                  => '&PREHOOK_flatten1',
+ 'spectralsequences'	=> '&PREHOOK_spectralsequences',
  'suftesi'              => '&PREHOOK_suftesi',
  'stix'                 => '&PREHOOK_stix',
  'texdraw'              => '&PREHOOK_texdraw',
@@ -5966,6 +5967,12 @@
   &SYSTEM ("$MV img/* doc/*/* doc/* designer/* contrib/*.* .");
 }
 
+sub PREHOOK_spectralsequences {
+  print "PREHOOK_$package - move src/* subdir up\n";
+  # leave examples/ and manual/ doc subdirs separate
+  &SYSTEM ("$MV src/* .");
+}
+
 sub PREHOOK_suftesi {
   print "PREHOOK_$package - move doc/latex subdirs\n";
   # not example/, then get logo.png clash



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