There may be times where you want to add a service to an appointment without sending the client another notification (create appointment sms).

To add a service to an existing booking, click on the client's appointment in the calendar, and click on '+ Add Another Service':

Choose the service, the staff member performing the service, and ensure that the time and any discount you want to add has been added:

This will add the new service to the client's appointment, but will not send them a notification that a new booking has been made.