When you create a room, if it is properly bounded by elements (such as walls) and room separation lines, Revit computes the room area between the boundaries.
Revit displays a warning if the room is not in a properly enclosed region.
To place a room tag when creating or placing a room in a view, select the Tag on Placement option. If you place a room without a tag, you can tag it later using the Tag Room tool. You can also use the Tag All Not Tagged tool to tag several untagged rooms in one operation.
As an aid to early design and programmatic studies, you can add rooms (for example, from a program list) to a schedule before you define walls or place rooms in a plan view. To add rooms to a room schedule, open a room schedule view and click Modify Schedule/Quantities tab
Rows panelNew. You can then place those predefined rooms in the project by selecting them in the Room list on the Options Bar while the Room tool is active.
If you place a new room within bounding elements or separation lines that contain a room that you placed previously, Revit warns you that the new room is redundant and suggests that you either move it or delete it.
You can delete a room by deleting it from a room schedule. The corresponding room tag is deleted as well. If you delete a room tag in a plan view, the room remains in the project and in the schedule.