Yes, I understand that thank you, but I'm refering to zooming in and out with the wheel on a wheel mouse while holding the OPTION key. There's a little hint under the Interactive Zoom Mode section of the User's Guide that implies that while using the PAN tool one does not need to hold the OPTION key in order to zoom with the wheel, which in effect would allow one handed panning and zooming with the mouse alone. I've noticed you can do this with AC (on the few times I've used it). I don't want you to think I'm too lazy to reach all the way over to the OPTION key to acheive the same result, I just thought it was a fun idea. But I guess that is not the implication of the User's Guide after all.