When an appointment is deleted from the Schedule Matrix, there is no history of the appointment under the members training history. In order to show the history, do the following:
1. Choose the appointment on the schedule matrix.
2. Choose one of the following options: no show, late cancel, or no charge cancel
3. Drill into the appointment again - choose either delete with charge (used with no show or late cancel and charges a session) or delete (used with no charge cancel and doesn't charge a session)
The training history will be updated with the cancel and the session is removed from the schedule matrix.
This is helpful if you are adding a new client to the trainer's time slot.