What is the purpose of the email schedules section?
The email schedules section is used to set up which and when emails are automatically sent. You can use automatic emails for things such as reminding guests that a payment is due, that they have an upcoming reservation, and to thank them for their stay.
Can I select only some of the triggering events?
Yes. If You can select whichever triggering events you need.
Can I set up an email schedule to be used for reservations I add through the Reservation Manager?
When editing an email schedule select Use Internal to set that email schedule as the scheduled to be used for reservations added from the Reservation Manager.