I’d almost finished my first design in SW and was assembling the model when I must have pressed something and the middle mouse button stopped rotating the view. I’ve tried everything I can think of and reinstalled drivers and such but it’s a good mouse and works fine in other programs. I tried assigning a shortcut for rotate to a key but it behaves erratically and can’t be used. The drop down loses the plane I highlight and is slow, the keys are ok but I really miss the mouse. I’ve been into the setting and restored defaults but all to no avail.

Does anyone know what I did to lose the middle mouse function?