| 1. | Select the Surfaces panel, sphere partial subpanel. |
| 2. | Click on the center collector and select a node from the graphics area. |
| 3. | Click on the R node collector and select a node from the graphics area. |
| 4. | Set the toggle to theta or phi to specify which axis is being defined. |
| • | Click on the theta collector and select a node from the graphics area. |
Or
| • | Click on the phi collector and select a node from the graphics area. |
| 5. | Enter the radius value. |
| 6. | Enter the theta begin value. |
| 7. | Enter the theta end value. |
| 8. | Enter the phi begin value. |
| 9. | Enter the phi end value. |
| 10. | Click create. |
| 11. | To undo, immediately click reject. |