1) Starting in the Scheduling Planner, hover your mouse over the shift you want to view the History for. This works the same in both Grid and Gantt views.
2) Click on the three dots that appear on the right side of the shift.
3) Click "History."
A pop up will appear that shows the History of the shift.
If you’re looking for a change log or .CSV file with all scheduling changes, check out the Dashboard section “Schedule Activity Log”.
Using the Schedule Activity Log
An exportable, in-depth record of all schedule changes