[NTG-context] line numbers or margin data in headers

Hi there, I'm trying to get a feature similar to those headers that display the first and last entry on a give page. I would like to do the same with line numbers on pages, which is especially useful for poetry. How could i change this in the following sample? \setupheadertexts[line--numbers] \starttext \startlinenumbering \dorecurse{50}{\input knuth\par} \stoplinenumbering \stoptext Many thanks for your help, Pablo -- http://www.ousia.tk