# [texhax] Why does adjustwidth in changepage package sometimes create a blank page?

Douglas McKenna doug at mathemaesthetics.com
Wed Dec 10 21:06:43 CET 2014

I'm automatically generating LaTeX code that needs to change the right margin of the page on a line group by line group basis.  And I'm not actually using \chapter at all (for now, but probably will once I understand how to customize it).  It's just that this
was the simplest example I could come up with that demonstrated the problem.  I figured if I could understand this little problem, I'd be able to understand my own.

- Doug McKenna

> Presumably because \chapter start by issuing \clearpage or \cleardoublepage
>
> You really should not use adjustwidth around chapters etc.
>
> What are you trying to achive?
>
> Institut for Matematik / Department of Mathematics
> Aarhus Universitet / Aarhus University
> Mere info:
>
>
>
> ________________________________________
> From: texhax [
> texhax-bounces at tug.org
> ] on behalf of Douglas McKenna
> [
> doug at mathemaesthetics.com
> ]
> Sent: 06 December 2014 05:26
> To:
> texhax at tug.org
>
> Subject: [texhax] Why does adjustwidth in changepage package sometimes  create a
> blank page?
>
> All -
>
> I need to change the right margin back and forth depending on the type of text in
> individual lines on the page.  So I've been using the changepage package and the
> adjustwidth command/environment, which seems to do the job.
>
> Except ...
>
> Here is a Minimum Working Example (pdfTeX, TeXLive 2014), that does what I'd expect
> for a onside book document.  If you run this MWE, you get two pages, each with a
> Chapter title on it.  So far so good.
>
> -------------------------------
> %%!TEX TS-program = pdflatex
> \documentclass[oneside]{book}
> \usepackage{changepage}
>
> \begin{document}
>
> \chapter{HERE WE GO}
> Blah
> \chapter{HERE WE GO AGAIN}
> Blah
>
> \end{document}
> -------------------------------
>
> Now, uncomment the two lines that invoke adjustwidth. Run again and the result is
> now THREE pages, with a blank page inserted in front of the first chapter page, and
> with a line number 1 peculiarly in the upper right corner, even though on the next
> two pages it's centered in the footer.
>
> And if you swap the two lines so that the \begin{adjustwidth} is AFTER the
> \chapter{HERE WE GO} line, the initial blank page 1 goes away.
>
> I don't want this extra blank page, but I don't understand what is causing it so I
> don't know what the right solution is.  Seems like a bug to me, because adjusting
> page margin width should be orthogonal to any typesetting or creating new pages.
>
> Any elucidation, ideas, or advices?
>
> TIA,
>
> Doug McKenna
>