The buffer on a calendar will only appear after a booking has been made.
Take this example:
- 60 minute interview
- 60 minute buffer after event
- Interviews start every 60 minutes
What the calendar looks like initially:
After a booking has been made at 10am, this is what the calendar looks like:
The next available appointment is at 12pm (10am to 11am appointment, 11am to 12pm buffer).