Use the lead time feature to set the minimum amount of notice your business requires for a booking to be made online.

As an example, if it is 12 pm and your lead time is 2 hours, then your clients will be able to book appointments starting at 2 pm.

In Settings, under Online bookings, go to Appointment lead time and set the appointment lead time. You can adjust the lead time settings any time you want, and it will take effect immediately.