After unplacing rooms, use a schedule to generate a list of the rooms that need new locations in the building model.
The room schedule lists all rooms defined in the building model. For any rooms that are currently unplaced, the schedule displays Not Placed for any read-only fields, including: Area, Perimeter, Level, Upper Limit, and Volume.
This tool filters the schedule so that it lists only the rooms that are not placed or enclosed. You may want to save this schedule so that you can quickly determine which rooms need to be placed or enclosed.