Left Button
Used to select objects, add data points/lines and choose menu items.
Wheel Button
Zooms in or out over the location of the arrow by rolling the wheel Up or Down respectively. If a point is selected, the rolling the wheel will zoom In or Out over that point. Holding the button down and moving the mouse allows the user to pan the 2D overlay (planview) on the screen.
Right Button
Used to display the Right Mouse Menu. This menu displays quick access to mode-specific commands.