The Add/Remove Edges command allows edges to be added to or removed from the interior of an unstructured domain. It requires a single domain to be selected prior to being available.
Select an unstructured domain which you wish to add edges to or remove edges from, then Edit, Add/Remove Edges. To add an edge, pick the loop of connectors in the Display window which form an edge. When the edge is complete, Flip Edge Orientation if necessary to ensure interior edges have opposite orientation of the outer edge. Use Save Edge to save the definition of that edge and move on to the next, if any. To remove an edge, click Begin Removing Inner Edges and select the edge or edges to be removed. Finish by clicking End Removing Inner Edges. Only interior edges may be removed, but the entire domain may be reconstructed using Restart Domain. All other commands are described in detail in the Unstructured Domain Assembly section.