AutoCAD Civil 3D

[#1]

Is it possible to merge two or more adjascent / overlapping surfaces into a single surface?

Is it possible to "Delete" multiple surfaces in one go?

[#2]

There are at least two ways to merge two surfaces

1.  Rename the less accurate surface. Paste the more accurate surface into the renamed sufaces.

2. Create a third surface. The first thing you need to do is paste the less accurate of the two surfaces, then paste the second surface into the new surface.

Hope that helps

Jim

[#3]

Merge = Paste

Delete = delete; isolate and use acad delete command