BWTR --

Those are the tracking controls -- they move the camera through 3d space.  The pan control is obtained by clicking on the dolly control (the round ball with the four arrows), which then changes to be a pan control and clicking it again makes it a "bank" control.  The difference between panning and tracking is that a pan is a camera move that keeps the camera located in one place but turns it so it shows a different view, whereas a tracking shot moves the camera through space to get a different perspective.

Each technique has a place in motion picture production, but they're not interchangeable. 

Patrick --

Thanks for the keyboard right-mouse-button tip; I hadn't seen that before. 

:D