Publishing a weekly schedule will publish shifts for all employees. Notifications are sent to all employees with shifts for the week when you publish shifts on the schedule pad. If you wanted, you could create and publish the shifts for the specific employees. This is a way for you to notify employees by position.
These may be a few ways to accomplish what you have in mind:
1. Create and publish shifts for employees with specific positions.
2. Draft the entire week's schedule, publish, and then filter by positions and print.