 orientation
to match that expected by Ghostscript, but doesn't always succeed.  It uses
this algorithm:
</p>

<ol>
<li>If the requested page size matches one of the Windows standard page
sizes +/- 2mm, request that standard size.</li>

<li>Otherwise if the requested page size matches one of the Windows
standard page sizes in landscape mode, ask for that standard size in
landscape.</li>

<li>Otherwise ask for the page size by specifying only its dimensions.</li>

<li>Merge the requests above with the defaul