Hi, Thanks for your help. Two of three problems are solved.
So you probably need to upgrade. Yes. That was solved the problem.
\about works with the above versions. The usage is \about[fig:ref] (without the curly brackets) Yes, also this works. I used the syntax from the cont-eni.pdf on page 205 \about{...}[ref]
\setupinteraction[color=] That does not work in the latest version. The style parameter is recognized, but ot the color parameter. Following produces red links, even if green is selected.
%========================= \setupinteraction [state=start, color=green, style=] \starttext \startuseMPgraphic{circle} draw fullcircle scaled 1cm; \stopuseMPgraphic \placefigure [] [fig:ref] {Text} {\useMPgraphic{circle}} \in{figure}[fig:ref] \at{figure}[fig:ref] \stoptext %========================= Best wishes Wolfgang Murth