Services can be used in several instances. More detailed information about using the services in different modules of the program can be found in the following articles:
If the guest already lives in the room and orders a service, you can always add it to an existing reservation. For example, you can enter Check in / Check out in the Porter section and find in the Living now tab the necessary reservation.
In the window that opens, find the Services tab. After that select the desired service in the corresponding field, and then save the changes.