To remove a level from a building, return to the Buildings page and click Edit next to your desired building.
Navigate to the levels listing for that building, and disable the required level, using the checkbox.
Save once complete.
To amend the name of a level within the levels listing, return to the Buildings page and head to the Levels section.
Select the Edit button to amend the name of a level, or the Delete button to remove it entirely.
Press Save once complete.