> Wolfgang Schuster <mailto:schuster.wolfgang@gmail.com>
> 10. Oktober 2016 um 10:39
> prefixconnector is the separator between the section number (=prefix) 
> and the float number (=figure number), the symbol at the end of the 
> float number is called numberstopper. In your example you don’t have a 
> section which can act as prefix number no did you change which 
> prefixes should be shown (by default only chapters are used as prefix).
>
> The suffix key you use (together with suffixconnector and 
> suffixstopper) is used to show the number for subfigures, e.g. figure 3.a.
Here is a working example for the use of the prefixconnector key.

\starttext

\section{This is a section}

\setupcaptions[prefixsegments=section,prefixconnector=-]

\startplacefigure[title=\tex{setupcaptions[prefixconnector=-]}]
\externalfigure[dummy][width=.5\textwidth]
\stopplacefigure

\stoptext

Wolfgang