I recently ran into a pretty big problem in that my middle mouse button no longer works. Obviously this is a pretty big deal since you need it to rotate the view. This is not a problem with Blender, but rather a hardware problem. So my question is: how can I change the keybinding for my middle mouse button until I can get around to buying a new mouse? I tried going into the properties panel, and the input section, but I could not find the option anywhere.