[texhax] Vspace Question

Rolf Turner r.turner at auckland.ac.nz
Sun Sep 2 04:52:57 CEST 2012

It seems pretty clear to me that the OP ***did not*** want
to set indentation to be universally zero.  He wanted indentation
to be zero *after setting "\noindent"*, which seems perfectly
reasonable.  And he was *not* getting a zero indentation after
a "\noindent" if the "\noindent" was immediately preceded by
a "\vspace" and the two were wrapped up in a "\newcommand".

There seems to be an indentation --- or a space --- of about the
width of a single letter, at the being of the line following the "\sep"
command.  Such a space is unwanted and I have no explanation
as to why it appears.

There was some recent discussion about the intricacies of
"\vspace", of which I have unfortunately saved no trace.
There *might* be some insight available from that discussion.

A workaround for the OP's problem would be to define "\sep" by


rather than in terms of "\vspace".  This seems to work, at least
in the OP's toy example.

Why things work with "\\[...]'' and not with "\vspace{...}" is
mysterious to me.  Perhaps some knowledgeable denizen of
the list will chip in and explain.  And/or suggest an alternative
(better) strategy.


             Rolf Turner

On 02/09/12 13:26, William F Hammond wrote:
> Zheng writes:
>> \documentclass{article}
>> \newcommand{\sep}[1]{\vspace{#1}\noindent}
>> \begin{document}
>> Hello
>> \sep{4mm}
>> some things here
>> \vspace{4mm}\noindent
>> Are texts above truly indent?
>> \end{document}
> I'm not sure exactly what you want.
> Maybe try something like this:
> \documentclass{article}
> \setlength{\parskip}{4mm}
> \setlength{\parindent}{0mm}
> \begin{document}
> Hello
> some things here
> Are texts above truly indent?
> \end{document}

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