In the Review Definition it is possible to create email events.
One of the email event types is "Reminder for performing review".
Can somebody explain how or when this email reminder events is triggered?
I can't find any parameter or configuration item that points to an event, schedule or dependency to the start or due date.
I also looked at workflows, but these have their own email templates and don't use the email event templates.
If you are referring to ReviewReminderEvent, then see answer here - Email Notification