REGION command
Creates regions.
Icon: 
Alias: REG
Description
Creates regions from closed entities or sets of entities that enclose a space.
Original entities:
Regions (6):
Method
Select closed entities or sets of entities that enclose a space. Each closed entity or set of entities produces a region.
You can continue creating regions until you press Enter key to end the command.
Depending on the current value of the DELOBJ system variable the original geometry is deleted or retained.