%\setuppapersize[A5]
\setuppapersize[height=210mm, width=148mm]
\starttext
\input ward.tex
\stoptext
The reason I ask is because I'd like to prepare a PDF for printing via IngramSpark, and have discovered that (bizarrely) their Australian branch doesn't support A5 for colour books. They do offer 6x9 (229x152), and I was wondering what values to use in 'setuppapersize', so I thought I'd experiment with the A5 sizing because it's a well known size.
Now I have no idea :-(
Thanks
Kerry