Compiling this file returns files ntg46-mpgraph.log ntg46-mpgraph.tex
ntg46-mpgraph.mpy ntg46-mpgraph.pdf  ntg46-mpgraph.tuc

% macros=mkvi

\setuppagenumbering[location=footer]

\startusableMPgraphic{NumberHead}
      picture r ;
      r := image ( graphictext
        "\bf\namedheadnumber{chapter}"
        scaled 5pt
        withfillcolor \MPcolor{lightgray}
        withpen pencircle scaled 1pt ; ) ;
      draw r ;
\stopusableMPgraphic

\def\processMPheadnumber#1%
  {\useMPgraphic{NumberHead}}

\setuphead
   [chapter]
   [command=\HeadTitle,
    headstyle=\ss,
    numbercommand=\processMPheadnumber]


\unexpanded\def\HeadTitle#1#2%
  {\framed
    [frame=off,
    bottomframe=on,
    width=broad,
    align={broad,nothyphenated,left}]
    {#1\blank[nowhite]#2}}

\starttext

\startchapter
  [title={Fist chapter}]

\input knuth

\stopchapter

\stoptext

2016-07-12 16:45 GMT+02:00 Hans Hagen <pragma@wxs.nl>:

> On 7/12/2016 3:30 PM, Fabrice Couvreur wrote:
>
>> Thank youfor the information, but it remains to delete the files ...
>> mpgraph.log
>>
>
> fwiw, mkiv normally doesn't have such files
>
> Hans
>
>
> -----------------------------------------------------------------
>                                           Hans Hagen | PRAGMA ADE
>               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -----------------------------------------------------------------
>
>
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