Manual to Automatic:
To do this you will need to go to your system settings, click 'Service reminders' then find the service reminder you would like to change. Click the edit button next to this service reminder. Here you can change whether the reminders are sent automatically or manually by using the 'Send reminders' dropdown.
Automatic to Manual:
Similarly, to do this you will need to go to System settings click 'Service reminders' then find the service reminder you would like to change. Click Edit next to this service reminder. Here you can change whether the reminders are sent automatically or manually by using the Send reminders dropdown.