In order to change the width of the bottom border of the first row of a natural table to 2bp, I can do
\setupTABLE[row][1][after={\hrule width\hsize height 2bp}]
and I have tried doing
\setupTABLE[column][1][after={\vrule height\vsize width 2bp}]
to change the width of the right border of the first column, but this does not work. I would appreciate some expertise on this.
Thanks,
Troy Henderson