By default, your available times will be displayed in 15 minute increments. You can change this to any value you desire from your "Set Up" page -> choose on "Availability Rules" under "Flexible Schedule Booking Interval":

You would also have the option to match the booking interval based on the service's duration you have set up on your account ***eg. if your service is set up to 30 minutes duration then the system would also reflect booking intervals to 30 minutes (this is only available : if you are using a flexible schedule), by clicking on the "use service duration" label:

You have the option to include buffer time if you use the "Service Duration" for your booking interval :

Did this answer your question?