Hello,
thanks for the answers.
So my solution now is:
----
\startuseMPgraphic{MP:ThickBtm}
draw bottomboundary OverlayBox withpen pensquare scaled 1mm withcolor black;
clip currentpicture to OverlayBox;
\stopuseMPgraphic
\installbottomframerenderer{Thick}{\useMPgraphic{MP:ThickBtm}}
\starttext
\bTABLE[width=.4\textwidth,frame=on,align={middle,lohi}]
\bTR[bottomframe=Thick]
\bTD a \eTD\bTD b \eTD
\eTR
\bTR
\bTD A \eTD\bTD B \eTD
\eTR
\eTABLE
\stoptext
----
Best regards,
Lukas
On Wed, 18 May 2016 00:25:26 +0200, Wolfgang Schuster
Alan BRASLAU mailto:alan.braslau@cea.fr 18. Mai 2016 um 00:17 On Tue, 17 May 2016 23:09:16 +0200
In case Wolfgang's answer was not clear: use "extreme" tables (\startxtable) rather than "natural" tables (\bTABLE). This mechanism uses 'framed' and is more flexible. There is no need to switch from natural to extreme tables because both tables uses framed for the cells. What is necessary to create individual borders for a cell is either a metapost background where you can solid, dashed etc. lines or custom frame types which can be defined with the \install(left|right|top|bottom)framerenderer command.
Wolfgang
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