Hi, For my book, the header for each chapter should be like the attached image. I don't know if I am using the best method, but the result looks like what I want. Nevertheless, I am having a problem. I don't understand why the first chapter is not numbered while the second is with number 1 etc. Thanks. Fabrice
################################### \definecolor[MyColorA][r=0.8784, g=0.8784, b=0.8784] \defineframedtext [FramedText] [ offset=0.6em, style=, toffset=\lineheight, background=color, backgroundcolor=MyColorA, foregroundstyle={\switchtobodyfont[11pt]}, align={left, broad}, frame=off, width=\textwidth, ] \setuplabeltext [en] [chapter=CHAPITRE] \setuppagenumbering [alternative=doublesided,location=] \unexpanded\def\HeadTitle#1#2% { \FramedText{{\cap\labeltext{chapter}}\space#1 \\ \bfc#2} } \unexpanded\def\processheadnumber#1% {\getmarking[chapternumber]} \setuphead [chapter] [style=\bfd, align={flushleft,broad}, numbercommand=\processheadnumber, command=\HeadTitle] \starttext \startchapter [title={La récurrence}] \startsection[title={Le principe de récurrence}] \input knuth \stopsection \startsection[title={Le raisonement par récurrence}] \input knuth \stopsection \startsection[title={Récurrences fortes}] \input knuth \stopsection \startsection[title={Exercices corrigés}] \input knuth \stopsection \stopchapter \startchapter [title=Combinatoire-Dénombrement] \input knuth \stopchapter \startchapter [title=Suites] \input knuth \stopchapter \stoptext ####################################
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