How can I Orbit in 3D?
A three button mouse is required to perform the Orbit in 3D. Hold down the middle mouse wheel (which acts as a
button) while you move the mouse in order to orbit the model. This will rotate the camera around the focus point.
Another option is to hold down the middle mouse button while you hold down CTRL on the keyboard and move the mouse
at the same time. This will rotate the focus around the camera to look around the model.