You can change the amount that the 3D model rotates for the 3D Rotate buttons.
To change the Rotate Step:
In 3D Model view:
1. Choose 3D ® Options.
In the 3D Options dialog box:
2. Click the 3D Options tab.
3. In the Rotate Step text box, type or select a value. Select degrees or radians.
4. Click OK.
The Rotate Step setting is applied to the active document only. To configure this setting for future documents, repeat the procedure using View ® Preferences instead.