You can also go in reverse on the XD9 when using the jump feature, which was explained by AJ. When pressing Fill #1 or Fill #2, the variations move from A-B-C-D-A, etc. However, when pressing Fill #3, the variations move in reverse... from A-D-C-B-A, etc. Of course, these are still adjacent moves, but I'm guessing that ~ 80% of my variation changes are such moves... and for the few that aren't, pushing 2 buttons works.

Glenn