fff89994_ation_Wheel___Beyond_the_Paper__Description
[Wedge] Orbit [Usage Steps] When you click and hold the Orbit wedge, the mouse pointer changes to the Orbit Tool and displays the rotation target. You drag the Orbit Tool to move the camera view around the rotation target. When viewing the interior of an architectural model, you may find it easier to use Zoom, Pan, and Look tools to change the view. You release the mouse button to exit the Orbit Tool. When the Orbit tool is active, you can set a different rotation target around which the camera travels when orbiting. You press Ctrl and click the Orbit wedge to display the rotation target. You drag the target to the location around which you would like to orbit. You then release the mouse button to set the new rotation target. The next time you engage the Orbit tool, the new target will be used. [Description] 
Orbit the view of the object.
Autodesk Design Review 2008: Full Navigation Wheel - Beyond the Paper
Description