fff89994_ation_Wheel___Beyond_the_Paper__Description
[Wedge] Look [Usage Steps] When you click and hold the Look wedge, the mouse pointer changes to the Look Tool.You then drag the Look Tool in any direction to point the camera in that direction. When done, you release the mouse button to exit the Look Tool. You can change the speed at which you look within a model when using the Look Tool. The Look Tool must be active to change the movement speed. Press comma (,) to incrementally increase the speed of the Look Tool. Press period (.) to incrementally decrease the speed of the Look Tool. Any movement rate changes you make while using the Look Tool will be in effect when you use the Walk Tool on the Full Navigation Wheel. [Description] 
Turn the camera to look in any direction without moving the camera.
Autodesk Design Review 2008: Full Navigation Wheel - Beyond the Paper
Description