Is there a way to typeset a paragraph with background extending only in
the margin?

I used the following setup, but I don't want the background to extend in
the top/bottom (or at least minimize it), any ideas?

\setupcolors[state=start]
\setupbackground
  [background=color,
   backgroundcolor=green,
   frame=on,
   backgroundoffset=.5cm]%,
   %leftoffset=0cm,rightoffset=0cm]


\starttext
\startbackground
\input tufte
\stopbackground

\input tufte
\stoptext


Regards,
 Khaled


-- 
 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer