I have somehow goofed up the behavior of the mouse wheel in Pro 9 and 10. It still works just fine in version 11. I am working on a joint project with a buddy who does not have 11, so I would like to use 10 but really miss the zoom function of the mouse wheel. It will zoom in 9 and 10, but only if spun quickly. In 11 each wheel click increases the zoom, this is no longer true in the other versions.

Any ideas? I have set the preferences to default w/o fixing the problem.

Update: It seems that it was a driver issue. All appears ok now, sorry for the inconvenience!

Regards,
Jerry