To create a surface to fill the gap between selected points on a surface:
The points on the edge region are displayed on the model:
To use the Manual option:
When you have made valid selections, the icons change from to, and the fill edge is highlighted:
Use the Reverse option on the Fill Edge Regions dialog to switch between the shortest path and the longest path for selected points. The surface created depends on the path you select:
To use the Automatic option:
Gaps larger than the Gap size are not filled.