You can clone an existing Floor and edit it to create a new Floor. To clone a floor, click the clone icon next to the floor name on the Building Widget.

When you click on the clone icon, the following Clone Floor prompt opens:

Enter the name you want to assign to the new floor and click on Clone. The Create Floor screen opens containing all the information copied from the Floor you were cloning. You can change any of the Floor parameters and will need to specify the Floor number. Click on Create Floor when you are done. The cloned floor is added to the list of floors on the Building Widget.