Please add an area on the appointment to add notes that can be viewed on the calendar. Possibly hover over and see the note pop up or show in the appointment block. This is a standard feature with most calendars. It is a great area to put notes about balances that need to be collected, copays, reminders for forms that need to be completed, or any specific notes to that client's appointment. It is not productive to have all of these in "internal notes" as that is hidden on the schedule.