To Create a Boundary Surface
1. Click > . The Surface tab opens.
2. Click the
![](../../surfacing/style/images/ff_collector_surface_primary.png)
collector and select at least two chains. A preview surface is displayed.
| The chains must intersect to form a continuous boundary. |
3. To add internal curves, click the
![](../../surfacing/style/images/ff_collector_surface_secondary.png)
collector, and then select one or more internal curves.
4. To modify a boundary or internal chain, trim or extend it.
5. To adjust the parameterization of the surface, click
![](../../surfacing/style/images/ff_reparam_mode.png)
and add reparameterization curves.
6. Click
![](../../surfacing/style/images/cl_ok.png)
.