Activate or Deactivate a Datum Plane
- 
                From the HyperGraph 3D toolbar, click the Datum
                    Planes icon, 
.
             - Select a datum plane from the Datum list or from the screen.
 - To activate a datum plane, select the Datum check box so that a check mark is displayed.
 - To deactivate a datum plane, select the Datum check box again to remove the check mark.