I'm trying to draw a frame using xy-pic and give that frame a different line width and color. The situation looks exactly like this:
\xy
(0,0)*++={};(90, 28)*++={} **\frm<8pt>{-}
\endxy
I would have expected to be able to add to color using
**[Red]\frm<8pt>{-}
However, this one does not work as expected. Any ideas?