> Thomas Fehige <mailto:thomas@fehige.de>
> 29. Juni 2016 um 12:14
> I wonder how I can get crop marks to work. This is what I have, but 
> they don't show:
>
> %=== MWE =====
>
> \definepapersize[Labelpaper][width=95mm,height=90mm]
> \setuppapersize[Labelpaper][A4,portrait]
>
> \setuplayout[
>     backspace=3mm,
>     margin=0mm,
>     topspace=3mm,
>     header=0mm,
>     footer=0mm,
>     width=89mm,
>     height=84mm,
>     nx=2,
>     ny=3,
>     location=middle,
>     marking=on   % according to the wiki,
You need a "," after "on", otherwise context uses the following spaces 
as part of the value and it sees "on ".

Wolfgang