[NTG-context] Using \defineoverlay for a framed text

[Willi Egger]

Hello listmembers,


I try to use a Metapost drawing as a background to a framed text. — I can not make it working though…

\startuniqueMPgraphic{Markings} %{Markings:\overlaywidth:\overlayheight}
	fill OverlayBox enlarged 5mm withcolor blue;
\stopuniqueMPgraphic

\defineoverlay[Marks]{\useMPgraphic{Markings}}

\setupframed[background=Marks]

\setupframedtexts
	[frame=on,
 background=Marks]	
	
\starttext
	\framedtext{Hello World!}
	\blank
	\framed{Hello World!}
\stoptext

What is wrong with this code?

Kind regards

Willi