Using Levels in AutoCAD Architecture or MEP

Solution:

The general workflow with levels in AutoCAD Architecture or MEP is as follows:

1. In the Project Navigator, on the Project tab, click Edit Levels to create or edit current levels.

2. Switch to the Constructs tab and create a new Construct or edit an existing one.
3. In the Add/modify Construct dialog, select the levels the drawing file should be assigned to and confirm with OK.