The Filter button allows you to refine the bookings list in the check in panel and on the diary so you're only looking at bookings that are relevant to you. More details here.
The Space Optimiser is a functionality that live checks to make sure the space in your venue is always being utilised to it's best. More details here.
Underneath both buttons lies the Check In facility:
At the top of this section, you will see the list of Bookings in for the that day (depending on the filters that you have set at the top) and each booking has three separate columns.
Left - The expected time of arrival and the customers name/'Walk in', plus any notifications associated with that booking.
Middle - The pax size of the booking and what table they are in. If the booking is 'Unassigned', instead of a table number you will see an arrow with an orange outline
Right - The status of the booking; whether it has been checked in or not. If you haven't checked the booking in, you'll see a Tick, and once you have clicked the tick to mark that booking as arrived, the panel will turn green and the tick will be replaced with a 'Left' icon.
Underneath your list of Bookings, you'll see Open Enquiries - these are In Progress Enquiries for this date.
Finally you'll see the Finished Bookings, these are the bookings you have marked as 'Left or 'No Show'.