Throughout live service, your tables will be outlined with various colours:
Tables with an orange outline indicate that the table is free for the next 90 minutes so that you can see at a glance where you can quickly place any walk-ins and any last-minute bookings. This should make it super easy and quick for you to see your available tables.
Tables with a red outline indicate that the booking that is currently in that table has less than 15 minutes left.
Tables will outline purple when you hover over a booking in the check-in list on the left-hand side.
Tables with dark grey colour on them will indicate a table/area that is closed.