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From: Joop Susan <jgsusan@xs4all.nl>
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Subject: Overlays...
Date: Tue, 20 Mar 2001 23:28:09 +0100
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Hello,

I have a document with different backgrounds (external PDFs) for even and 
odd pages.

I have found how to get the right background on the right page.

\defineoverlay
    [papier]
    [{\ifodd\realpageno {\externalfigure[voorkant][width=\overlaywidth,heig
ht=\overlayheight]}
     \else {\externalfigure[achterkant][width=\overlaywidth,height=\overlay
height]}
     \fi}]

My problem is that the different backgrounds require setting a different 
topspace and height for the page.

My question: Where can I place the different setuplayout[topspace=..,height
=..] commands so the are evaluated again for every page (different for 
even and odd pages)?

Thanks,

Joop