How to identify a modified shift on a published schedule?
In schedule view in Teamwork, when you look at the shifts, the "M" shown below indicates a shift has been Modified
Clicking on the shift will show the audit trail of changes. In the example below, the shift was created after the schedule was published.
Pressing the SHOW DELETED PUNCHES toggle will reveal deleted shifts:
Deleted shifts look as shown below. Clicking the shift / audit trail will show who made the delete and when.