> ## Documentation Index > Fetch the complete documentation index at: https://docs.billbasket.app/llms.txt > Use this file to discover all available pages before exploring further. # Bookable services setup > Choose which BillBasket services can be booked as appointments and set each one's duration, how many can run at once, and a gap between bookings. Before you can book appointments, you tell BillBasket which of your services are bookable and how each one behaves on the calendar — how long it takes, how many can run at the same time, and whether to leave a gap between bookings. This is what makes the [booking form](/customer-guide/appointments/booking-basics) fill in end times and stop double-booking automatically. ## Understanding the fields On the **Bookable services** screen, each service has: * **Bookable** (toggle) — whether this service shows up as an option when booking an appointment. A service you sell over the counter but never book a time for can stay off. * **Duration (minutes)** — how long the service takes. This is what the booking form uses to fill in the end time automatically, so a booking's length matches reality without anyone doing the math. * **Parallel capacity** — how many of this service can run in the same time slot (for example, 3 if you have three chairs). BillBasket blocks a booking once a slot hits this number. Note the interaction with staff: if you assign a specific **provider** to a booking, that provider can only do one at a time regardless of this number — so capacity is the *upper* limit, and an assigned provider narrows it to one. * **Buffer (minutes)** — a gap left after each booking (for cleanup, turnover, notes) before the next one can start. Increasing the buffer effectively spaces bookings further apart. * **Colour** — an optional colour to tell services apart at a glance on the agenda. ## See it on your device A service's bookable settings — **Available for booking** toggled on, with Duration, In parallel (capacity), and Buffer after all set, plus a Calendar colour picker to tell services apart on the agenda. Bookable service settings showing duration, parallel capacity, buffer, and calendar colour *Screenshot coming soon — Android phone view.* *Screenshot coming soon — Android tablet view.* ## Try it: James Spa James Fernandes opens the Bookable services screen from the Appointments module to set up how his treatments book. For "Aromatherapy Massage" he turns on **Bookable**, sets the duration to 60 minutes, and sets parallel capacity to 2 — the spa has two massage rooms. He adds a 15-minute **buffer** so the room can be reset between clients, which automatically spaces those bookings apart on the agenda. Now when Priya books that service, the end time and the two-room limit are applied automatically — see [Booking basics](/customer-guide/appointments/booking-basics).