Bottom margin vs. descenders question

[Reinhard Kotucha]

On 2020-06-26 at 14:41:49 +0100, Philip Taylor wrote:

 > > \newdimen \dekoffset
 > >
 > > \dekoffset = 1 true in
 > >
 > > \hoffset = \dimexpr \hoffset - \dekoffset \relax
 > >
 > > \voffset = \dimexpr \voffset - \dekoffset \relax

Hello Phil,
just for the record, with pdftex-based formats you can save a
\newdimen with

  \hoffset = \dimexpr \hoffset - \pdfhorigin \relax
  \voffset = \dimexpr \voffset - \pdfvorigin \relax

You can even save the arithmetic as well with

  \pdfhorigin = 0pt
  \pdfvorigin = 0pt

These variables are set to '1 true in' in pdftexconfig.tex, which is
read by {pdf,lua}tex.ini and thus go into the format files.  As far as
I can see they are not available in XeTeX, unfortunately.

Regards,
  Reinhard

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Reinhard Kotucha                            Phone: +49-511-3373112
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