SteeringWheel Center Command
Use the Center command to point to the center of the current view of a model. To find the center, drag the cursor over the model. A sphere indicates that the point below the cursor is the center of the current view of the model. When you release the mouse button, the model is centered on the sphere.
Note: If a center point on a model cannot be identified, then a circle with a diagonal line displays instead of the sphere, indicating that the operation cannot be performed.
The point defined by the Center command provides a focal point for the Zoom command and a pivot point for the Orbit command.
Note: To zoom from the Full Navigation wheels from your defined center point, hold down CTRL before zooming.