When using auto-confirm, you can customise what times you want the tables to be able to be booked from and to by choosing from the drop-down times.
Please note, the 'Until time' is not the the latest time the table can be booked, rather the time the booking needs to be finished by. This can be particularly useful if for example your restaurant closes earlier than the rest of the venue and you need a booking to be finished on this table by a certain time.
To get to your Table/Areas list in your admin, go to Settings:
> select venue