To Create a Datum Plane with an Angular Offset
1. Click
Model >
Plane. The
Datum Plane dialog box opens.
2. Click the References collector and select an existing datum axis, straight edge, or straight curve.
3. Select Through from the constraints list in the References collector.
4. Hold down the CTRL key and select a datum plane or planar surface that is normal to the selected datum axis. By default Offset is selected as the constraint.
|  You can also first select a planar surface to create the datum plane. |
5. To adjust the angle of the datum plane, type an angular value in the Rotation value box, or drag the handles in the graphics window to manually rotate the datum plane to the required angle.
6. Click OK.