| 1. | Select the Surfaces panel, spin subpanel. |
| 2. | Set the collector to lines and select the relevant lines. |
| 3. | Optionally, check on or off the merge input lines checkbox. |
| 4. | Specify how the new surfaces will be organized by setting the create in option. |
| 5. | Define the axis of rotation using the plane/vector collector. |
| 6. | Enter the start angle value. |
| 7. | Enter the end angle value. |
| 8. | Click spin + or spin -. |
| 9. | To undo, immediately click reject. |