Dear gang,
Just put together a macro that appears to do what's desired.
However, is there a cleaner, more ConTeXt-like way to do this?
=======
\newcount \MQT
\MQT=1
\define[1]\NUM{%
\framed[offset=overlay,frame=off,background=color,backgroundcolor=green]
{\starttabulate[|c|]
\NC \mbox{\the\MQT} \NR
\NC #1 \NR
\stoptabulate}%
\advance\MQT by 1
\hbox{}}
\startTEXpage
\dorecurse{5}{Unnumbered Text \NUM{Numbered Text} }
\stopTEXpage
=======
See attached. Thanks in advance for any suggestions for improvement.
Best wishes
Idris