I have recently purchased a Marble trackball mouse, I can pan and zoom with it but I can't seem to figure out how to spin my model with it. It's proably something simple that I am not doing, but I would appreciate the solution from someone. Thanks.
I have had the same trouble with a logitech trackman ball mouse. The soution I found was to go into the mouse settings in the control panel and go to mouse properties, in there you should see a section called button assigments. It is the middle/button 2 that you need to change from the default which is usually webwheel or something like it and change it back to function as a middle button. Hope this helps, Thom. UK. Hants