[NTG-context] Highlight current chapter in list

Hi! How do I highlight the current chapter in the table of contents? The TOC is displayed on each page. For illustration I misused the interaction colour, which of course only works for the first page of a chapter. \setupheadertexts [\setups{headlist}] \startsetups [headlist] \framed[align=normal, frame=off] {\placelist [chapter] [alternative=f, criterium=all]} \stopsetups \setupinteraction [state=start, color=lightgray, contrastcolor=darkgreen] \starttext \startchapter [title=alpha] \stopchapter \startchapter [title=beta] \page\input knuth \stopchapter \startchapter [title=gamma] \stopchapter \stoptext Marco