When setting up Auto-confirm rules for a booking type within a venue, at least one or more tables or areas must be added, or the Auto-confirm function will not work as the system will not know where to allocate the bookings.
To add a table:
Click Settings, Sites, and choose the site.
Click Booking Types and choose the booking type.
Scroll down to Areas for this Booking Type. This is where you can edit the tables you are happy for bookings of this type to be placed into.
Click Edit Areas to add the tables you want to auto-confirm. To add all tables, select the very top Area box.
Click Done and then Save.
Once you have a list of tables, you can create a table hierarchy by using the drag and drop Icon cross 
in the table list.
You can place them in the order you want your tables to be booked, with the table at the top being the first to be auto-confirmed, the second from the top being the second to be auto-confirmed etc.
📌Note: If a table at the top of the list has already been allocated, capacity does not suit, the system will work down the list until a suitable table is found.
Tools
The Find Areas tool in your Diary, Floorplan, or Run Sheet and within the Assign to Areas section also works from the tables listed in the Areas for this booking type to suggest available tables or areas for the specific booking type.
The Space Optimiser tool is also only able to work if you have tables or areas selected within a certain booking type.