This does not what I have in mind:

\setupheadertexts[text][chapter][\pagenumber chapter][pagenumber][chapter]

Instead of [\pagenumber chapter] I thought [\pagenumber \chapter] would give me in the header both the pagenumber and the recorded chapter title.

However \chapter turns out to be undefined, neither did \chaptertitle. What is the macro to be called?

In my previous post I forgot to ask the same question about [chapternumber] where also \chapternumber does not exists. (sorry for the noise)