To Fill an Inner Loop
1. Click Fill on the GATHER STEPS menu. The GATHER FILL menu appears. The following are available:
◦ All—Fill all loops on a selected surface.
◦ Loops—Select loops to be filled. For each loop to be filled, you have to select only one edge. If you gather using Surf &Bnd, the edges must lie on the bounding surfaces.
2. Select a surface. All inner loops on this surface are filled, whether they belong to bounding surfaces or not.