If you have already completed the table settings, please refer to the following steps or this tutorial video (05:01~) to arrange the table layout into a Floor Plan using the iPad inline App:
Click Settings > Tables
Select New Floor Plan and key in Floor Plan name > click again to enter Floor Plan
Long press the table and drag it into the Floor Plan from No Table(s) Assigned section
You can design your Floor Plan with icons from New Item
Click Done to save