I searched the Knowledgebase for "where can parents set their notifications", hoping Blackbaud had a pretty set of graphics I could refer a parent to. The auto-generated answer really did not inspire confidence:
Parents can set their notifications in the Enrollment Management section. They can access the notification settings by following these steps: Enrollment Management > Communication > Notifications. From there, parents can customize their notification preferences.
PROBLEM: parents do not have direct access to the Enrollment Management module. It is not an option for them unless they are also an employee.
I'm keeping the generated answers visible, for now, but mostly for their entertainment potential.