Working for the first time in Acad2013, and am having difficulty with realtime panning with the mouse wheel (Logitech M705) pushed in. If I hold the wheel perfectly still, it works as I am used to on other versions, but this mouse has a "wobble" built into the wheel which clicks as the wheel is tilted left or right. A click either way seems to turn the mouse into what I would call "joystick mode", and I'm suddenly miles away from my previous location, and looking at a black screen. I have to zoom extents and find myself again, and it's driving me nuts. I looked at the mouse button definitions in the CUI, and there are buttons defined up to #10, but a) I don't know what button numbers conform to this wobble switch on the wheel, and b) none of the indicated definitions sounds like this function I am seeing, anyway. Can anybody help me before I go postal?