1. Open the booking you want to add the booking extra to.
2. Click onto Edit (top right corner).
3. Select the Booking extras tab.
There are three sections of booking extras:
There might be booking extras that have been set up in the system, but they have not been allocated to the property for which this booking has been created.
By default they are hidden, but by clicking onto show will display them and allow you to add them to the booking.
You can also hide these booking extras again, by simply clicking onto the hide link.
4) Click Save at the bottom of the pop-up.
The pop-up closes and the made changes are being applied to the booking.