Re: plain TeX: different \hsize and \vsize for odd and even pages (was: plain TeX: different margins for odd and even pages)

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changing at a forced page break is easy, basically

\par
\break

\hsize=...
\vsize=...


Changing \vsize at an automatic page break is a bit more involved,
changing \hsize at an automatic page break is verging on impossible, you
need to control how many lines into a paragraph a page breaks and then set
up a \parshape that mimics the change in \hsize at the page break.

David



On Wed, 8 Apr 2026 at 18:43, Rodolfo Medina <[email protected]>
wrote:

> Rodolfo Medina <[email protected]> writes:
>
> > [...] suppose I want to set different margins for add and even pages,
> say 5mm
> > left and 10mm right for odd pages and the opposite for even pages: please
> > suggest whoever can a proper way to do it.
>
>
> Solved that problem with listers TeX-perts' help, now suppose I want to do
> the
> same with \vsize and \hsize, i.e. set a different \vsize (and/or \hsize)
> value
> from odd to even pages: is it possibile?  I mean in `pure' plain TeX.
>
> Thanks,
>
> Rodolfo
>
>

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<div dir=3D"ltr"><div><br></div><div>changing at a forced page break is eas=
y, basically</div><div><br></div><div>\par</div><div>\break</div><div><br><=
/div><div>\hsize=3D...</div><div>\vsize=3D...</div><div><br></div><div><br>=
</div><div>Changing \vsize at an automatic page break is a bit more involve=
d, changing=C2=A0\hsize at an automatic page break is verging on impossible=
, you need to control how many lines into=C2=A0a paragraph a page breaks an=
d then set up a \parshape that mimics the change in \hsize at the page brea=
k.</div><div><br></div><div>David</div><div><br></div><div><br></div></div>=
<br><div class=3D"gmail_quote gmail_quote_container"><div dir=3D"ltr" class=
=3D"gmail_attr">On Wed, 8 Apr 2026 at 18:43, Rodolfo Medina &lt;<a href=3D"=
mailto:[email protected]">[email protected]</a>&gt; wrote:<br=
></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;=
border-left:1px solid rgb(204,204,204);padding-left:1ex">Rodolfo Medina &lt=
;<a href=3D"mailto:[email protected]" target=3D"_blank">rodolfo.medi=
[email protected]</a>&gt; writes:<br>
<br>
&gt; [...] suppose I want to set different margins for add and even pages, =
say 5mm<br>
&gt; left and 10mm right for odd pages and the opposite for even pages: ple=
ase<br>
&gt; suggest whoever can a proper way to do it.<br>
<br>
<br>
Solved that problem with listers TeX-perts&#39; help, now suppose I want to=
 do the<br>
same with \vsize and \hsize, i.e. set a different \vsize (and/or \hsize) va=
lue<br>
from odd to even pages: is it possibile?=C2=A0 I mean in `pure&#39; plain T=
eX.<br>
<br>
Thanks,<br>
<br>
Rodolfo<br>
<br>
</blockquote></div>

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