If you want to see which changes have been made to a review cycle by an admin, you can click the 'View Activity' button.
Here you can see a list of changes in the current cycle, and who made those changes.
The actions that are tracked by this list are as follows:
Renaming a Review Cycle
Adding a participant
Removing a participant
Extending the Review Cycle end date
Un-submitting a Manager Review
Un-submitting a Self Reflection
Calibration saved for a Manager Review