Willi,
I had a go at this and found two things that I do not understand;
\setuplayout[page] [topspace=5mm,backspace=5mm]
Did not adjust anything until the [page] was removed and then the
incorporated page seems to adjust appropriately. I do not understand the
significance of [page] in this
22, 2003 4:20 AM
Subject: Re: [NTG-context] \setuparranging 3SIDE
How about the XY option:
[copied from page-imp]
% % handy for stickers etc, this way we can treat them as page
%
% \setuppapersize [XY][A4]
% \setuppaper [topspace=5mm,backspace=5mm,dx=1mm,dy=1mm,nx=2,ny=6