To Create a Trimmed Rectangle Surface
1. Click 
Style > 
Surface. The Surface tab opens.
Style > Surface. The Surface tab opens.2. Select three or more chains that intersect to form a contiguous boundary. A preview surface is displayed.
3. To modify a boundary chain, trim or extend it.
4. To add internal curves, click the 
Internal chains collector, and select curves.
Internal chains collector, and select curves.5. To create a 3-sided or a 4-sided trimmed rectangle surface, click the Options tab, and under Trimmed Rectangle, select the Use for 3 and 4 boundaries check box.
 | When you select two, or more than four, boundary chains, a Trimmed Rectangle surface is created automatically. |
6. To create surface connections, right-click the connection icons and choose a connection type from the shortcut menu.
| | Reparameterization curves are not supported for trimmed rectangles. |
7. Click 
OK.
OK.