Dear List,
After some work I have this example.
\starttext
\startformula
\startmathmatrix
[fences=parenthesis]
\VL\NR
\HL
\NC \NC \NC \NC \NC \NC \VL \NR
\stopmathmatrix
\stopformula
\stoptext
My problem is, that after the second \VL the \HL goes on the left side, and is too long, and not on the right side. Should be as the first one, but shorter.
Many thanks
Uschi