| 1. | Select the Surfaces panel, spline/filler subpanel. |
| 2. | Optionally, check on or off the auto create (free edges only) checkbox. |
| 3. | Set the collector to lines and select the relevant lines. |
| 4. | Optionally, check on or off the keep tangency checkbox. |
| 5. | If the auto create (free edges only) checkbox is off, click create. |
| 6. | To undo, immediately click reject. |