The Policy Center is accessible from the left-hand sidebar of Complyance. You'll find it located below the Control Center and Evidence Center and above Alerts.
Click on the Policy you want to edit the Revision Details for in the Policy Center. Then, navigate to the 'Versions' Tab on the right-hand side of the Policy Drawer.
Locate the policy version you want to update in the Versions table.
Then, Click the three dots (⋮) on the right-hand side of the table for that version.Select Edit Revision Details.
A pop-up box will appear with a text field where you can enter or update the revision details. Once finished, click Submit in the bottom-right corner of the pop-up to save your changes.