EDGESURF command
Creates 3D polygon mesh patches between four linear entities (short for “edge-defined surface”).
                Icon: 
Method
Create an edge surface (2) by selecting each four connected linear entities (1) for it.
                
                The four entities must be:
- Linear: open entities, such as lines, arcs, open splines, and open polylines.
 - Connected: touching or overlapping, so that they form a closed area.
 
Grips Editing
Edge meshes can be edited directly through grips:
Drag a grip (1) to stretch (2) the adjacent faces.