I have a split surface of another material, in a Topo surface, and I want to edit its boundary, but it would not let me do it. Somehow, I cannot pick the topo surface to edit (extent) the material that was added before using the "Split Tool", and neither it let me add into the topo surface, that it, it would not let me add the material near by. I am thinking of why this split surface is not easy to change its boundary like the other things in Revit 2021 that will allow us to edit its boundary easily via sketching.
How to change the boundary of an already splatted surface? (The Topo surface is not locked).
