Add a Datum Plane to a Plot
- 
                From the HyperGraph 3D toolbar, click the Datum
                    Planes icon, 
.
             - 
                Click Add.
                Datum 1 is displayed in the Datum list.
 - Enter a name for the datum plane in the Datum text box.
 - 
                Press Enter.
                The new name is displayed in the Datum list.
By default, the Datum check box is active and the datum plane is displayed in the plot.