Hans et al, Why do we lose the chapter number in headers (and other places) with this: \setupwhitespace[medium] \setupindenting[medium,yes] \def\headermarkleft{\bold{\pagenumber}\headerskip{\sc\headerskip Chapter \headnumber[chapter]\headerskip\getmarking[chapter][current]}} \def\headermarkright{{\sc{}Section \headnumber[section]\headerskip \getmarking[section][current]}\headerskip\bold{\pagenumber}} \def\headerskip{\hskip 1em} \setuppapersize[letter][letter] \setuplayout [backspace=120pt, cutspace=80pt, topspace=50pt, bottomspace=50pt, leftmargin=65pt, rightmargin=50pt, width=middle, header=40pt, footer=40pt, height=middle] \setupheadertexts [] [\headermarkright] [\headermarkleft] [] \setuppagenumbering [state=start, alternative=doublesided, location=, way=bytext] \setupheadnumber[chapter][-1] \starttext \chapter[chap:0]{Preliminaries} \input tufte \section{One} \dorecurse{3}{\input tufte\par} \section{Two} \dorecurse{3}{\input tufte\par} \stoptext