If you want to format the TOC line you have to use command=... together with alternative=command. \define[3]\ChapterNumber{\line{Chapter #1: #2\hfill#3}} \setuplist   [section]   [alternative=command,    command=\ChapterNumber] \starttext \completecontent \startsection[title={blabla}]   blabla \stopsection \startsection[title={blabla}]   blabla \stopsection \startsection[title={blabla}]   blabla \stopsection \stoptext If you want to use numbercommand anyway, then make sure that you use it correctly.  It only takes one argument and you have increase the width of number field. \define[1]\ChapterNumber{Chapter #1:} \setuplist   [section]   [width=2.5cm,    numbercommand=\ChapterNumber] \starttext \completecontent \startsection[title={blabla}]   blabla \stopsection \startsection[title={blabla}]   blabla \stopsection \startsection[title={blabla}]   blabla \stopsection \stoptext On Mon, 2017-12-11 at 10:06 +0800, SteamedFish wrote:

I don’t know if I use it wrongly, or it’s a bug in ConTeXt, but use \setuplist with numbercommand renders wrongly 

% this is not working, ``chapter’’ and chapter name overlapped \define[2]\ChapterNumber{chapter #1: #2} % have to add extra spaces here to avoid overlapping % \define[2]\ChapterNumber{chapter #1:\space\space\space\space\space\space #2} \setuplist[section][numbercommand=\ChapterNumber] \starttext \completecontent \section{blabla} blabla \section{blabla} blabla \section{blabla} blabla \stoptext

I use ConTeXt standalone with Mac OS X

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