Wix Bookings - Customising service appointment duration

Solved!
Don’t mind me - I’ve found the ‘Custom duration’ function at the bottom of the duration list - I had never scrolled down that far as assumed it just went up in 15min increments. Whoops!

Question:
Is there a way to customise the duration of appointments other than the standard 15 mins, 30 mins, 45 mins etc?

Product:
Wix Bookings

What are you trying to achieve:
We have services that only take 5 mins, or 20 mins, but are currently having to book these in for 15 mins, or 30 mins respectively which cuts down availability.

What have you already tried:
I’ve googled and the closest I’ve found is a feature request to allow customers to choose duration, but this isn’t quite what I need. I’ve gone through the Bookings settings and can’t see any options to edit the default service durations.

Thanks in advance!

I this you will find it’s option in booking settings>Appointment time slots. There you can set a intever of the booking time