> Meer, Hans van der <mailto:H.vanderMeer@uva.nl>
> 8. Oktober 2015 um 12:13
> The reference manual explains that one can set individual numbers on a 
> chapter:
> \setuphead[subsection][ownnumber=yes]
> \subsection{399}{The old number}
>
> So I tried \setuphead[chapter][ownnumber=yes] but then I am in the 
> dark how to use this.
> The reference manual (september 2013 -- latest?) was of no help 
> because it does treat \chapter but not yet explains \startchapter. 
> Neither did the ConTeXt Commands (July 2015 version) offer me I clue.
>
> I tried \startchapter[number=6] but this doesn't work.
> How to?
You need \setuphead[chapter][ownnumber=yes] only when you want to use 
the \chapter command but not when you use \startchapter.

\starttext

\startchapter[title=Knuth]
\input knuth
\stopchapter

\startchapter[title=Zapf,ownnumber=11]
\input zapf
\stopchapter

\stoptext

Wolfgang