After creating rooms, you can remove rooms from a building model temporarily or permanently. 
-   Unplace: Removes the room from its location in building model, but the project still contains information about the room. Then you can place the room in another location later during a project redesign. 
 
-  Delete: Completely removes the room (including all information about the room) from the project. 
 

A floor plan containing rooms, and a room schedule