General

The General tab in the Display Options dialog allows the user to define the settings for rotating the model. The user can select the:

• Rotation Center (Cursor Location, or Viewport Center)
• Viewport Rotation Type (Turntable, or Trackball)
• Speed of Rotation
• Show Rotation Center

Center of Rotation

It is recommended for the user to enable the Show Rotation Center option to see how each of the options work:

• The Cursor Location option uses the cursor's location to determine the center of rotation for the model.
• The Viewport Center option uses the current viewport's center point as the reference with which rotation is done.

The user can also change the sensitivity of the mouse by changing the Speed of Rotation and Key Step.

Viewport Rotation Type

• With the Turntable option selected, the model is rotated in a manner analogous to a record spinning on a turntable. Use the arrow keys on your keyboard to rotate the model in the desired direction. (Use the Speed of Rotation option mentioned above to adjust the speed.)
• If the Trackball option is selected, the model is rotated in a manner analogous to a ball in the middle of the screen and dragging the mouse will roll this ball in the direction of the mouse.

The user should spend some time with these settings to become comfortable with the different rotation options.