Surface Editing Tools

Fillet

Surface tab - Edit panel - Fillet

Create a fillet with a specified radius between two surface edges


Trim

Create complex edges and holes in surfaces
Can use the Untrim tool (UNTRIM command) to untrim a trimmed surface

Extend

Extend a surface by selecting an edge

Sculpt
Surface tab - Edit panel- Sculpt

Create a new solid object based on the enclosed volume of multiple intersecting surfaces