There are few ways to create a booking.
1) From BedView
Select the beds you want to create a reservation on, right click on them and choose Create Reservation
Put the necessary guest data and click Save or Save and Close.
Here you can find more information about Reservation Window and its options: LINK
2) From New Reservation window
You can find a New Reservation Window in two places:
After clicking on one of them you will the new reservation window.
* Choose the check in and check out date
* Click Add Room Type
* Choose the room types you are interested in and click Save.
3) You can also use the Quick Booking option: Adding a Quick Booking