Summary
Follow Up Settings can be accessed via: Administration > Settings and selecting the 'Follow Up' category.
This page documents each setting.
Details

Memo Popup when Saving Treatments accessed via Appointment
Enabled = Display memo when saving treatments accessed from the diary screen.
Disabled = Do not display memo when saving treatments accessed from the diary screen.
Follow Up Appointment
Disabled = Disables the Follow Up Appointment module.
Enabled and Enforced = Enables the module and enforces users to book the next appointment.
Enabled and Selected = Enables the module and allows users to select to book the next appointment or not (by unchecking the checkbox).
Enabled and Unselected = Enables the module and allows users to select (by checking the checkbox) to book the next appointment or not.
Declined Appointment - Do not prompt for reason
Enabled = Do not prompt users to provide a reason if declining a follow up appointment request.
Disabled = Prompt users to provide a reason if declining a follow up appointment request.