I need to add a 15 minute buffer after each appointment

In Appointments +, I need to automatically add a 15 minute buffer after each appointment to reset the room. I can't have a 60 minute appointment at 10am and then another one at 11am. The next earliest appointment should be 11:15am. I can't just make the appointment 75minutes because clients would think the service was 75 minutes instead of 60 minutes.

Thank you,
Dan