What technical reasons are behind this?
From manual of package geometry:
... paper size options (such as papersize, paper=a4paper and so forth), which can’t be changed with
\newgeometry
.
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Sign up to join this communityWhat technical reasons are behind this?
From manual of package geometry:
... paper size options (such as papersize, paper=a4paper and so forth), which can’t be changed with
\newgeometry
.
I thank @DavidCarlisle and @UlrikeFischer for the support in providing this answer
paperwidth
and paperheight
are LaTeX lenghts, which are then ultimately converted in eg pdftex
into the lenghts pdfpagewidth
and pdfpageheight
using this snippet:
\ifGin@setpagesize
\ifx\paperwidth\@undefined\else
\AtBeginDocument{%
% If a package has changed \mag, assume it knows what it is doing
% and leave page size alone
\ifnum\mag=\@m
\@ifundefined{stockwidth}{%
\@ifundefined{paperwidth}{%
}{%
\ifdim\paperwidth>0pt\relax
\ifdim\paperheight>0pt\relax
\pdfpagewidth=\paperwidth
\pdfpageheight=\paperheight
\fi
\fi
}%
}{%
\ifdim\stockwidth>0pt\relax
\ifdim\stockheight>0pt\relax
\pdfpagewidth=\stockwidth
\pdfpageheight=\stockheight
\fi
\fi
}%
\fi
}
The "LaTeX" counterparts are discarded after the document has started (meaning they are not meaningful anymore), while the pdf
counterparts are the ones ultimately used for setting.
Geometry sets the pdf
lengths also at the begin of the document, possibly to maintain compatibility with the dvips
drivers (which do not support multiple page sizes), so it does not allow them to be reset during the document, thus discarding the paper resizing options