Thanks a lot that works.
I've a follow up
question. I'd like to wrap the `\setgvariable` in a a
paragraph like
thing. I found out about annotations, which look like
what I've
after.
Though sadly I get an error message (! Undefined control
sequence) when
I use annotations. It works when I hard-code a value
within the
annotation, but it doesn't if I use the contents of the
annotation. I've
also tried it the `\placeannotationcontent` way, but
there I get the
same error. Here's the full example:
\starttext
\definelayer
[pagenumber][width=\overlaywidth,height=\overlayheight]
\defineoverlay[pagenumber][{\directsetup{pagenumber}\tightlayer[pagenumber]}]
\startsetups
pagenumber
\setlayerframed
[pagenumber]
[preset=rightbottom]
{\getvariable{table}{p}}
\stopsetups
\define[2]\PageWrapper{\setgvariable{table}{p}{#2}}
\usemodule[annotation]
\defineannotation
[pn]
[alternative=command, command=\PageWrapper]