I should clarify, for the benefit of those who think I meant that xypic (the package in question) uses its own fonts for the arrow sources or labels, I should clarify that it uses the ordinary TeX fonts except for the arrows. These are built from line segments at 256 different slopes, giving angular resolution of 256/180 = .7 deg and 512 half arrowheads giving arrowheads at that many angles. The arrowheads are extremely graceful, more elegant than those in ordinary Tex and massively more elegant than those of latex. Other than that, it uses whatever your symbol font is. For example, you could substitute the concrete math fonts, if you wanted. I have gotten several replies, the most interesting from David Benson who feels that xypic is probably the best, but that there shouldn't be just one, but a choice. He feels that a package that makes it hard to draw a complicated diagram that *also* has complicated arrow labels should be encouraged, so that people tempted to use such a horror be discouraged. Perhaps I have stated it a bit more strongly than he would, but that is the thrust of his remarks. Michael ==============================================================================