Command entry:Compact Material Editor

Go to a map level or a standalone map.

Type button

Material/Map Browser

Choose a compound map.
The Replace Map dialog is displayed when you change a map type to any type of map that can have sub-maps. It gives you the
choice of replacing the original ("old") map completely, or using the original map as a sub-map of the new map.
Interface
- Discard old map
-
- Keep old map as sub-map
-
Retains the old map as a sub-map.