If tracking the performance review form history is enabled, the user can check all the versions of the form submitted by different participants of the review process. The system stores a review form version after the reviewer clicks Submit to complete the review step.
To enable tracking the history, go to Settings > Settings and Configuration > Performance and under Performance Reviews, click the Advanced tab. Select the Enable Form History check box.
To open the form history, open the performance review form and under the Review Details, click View Review History. 
The following information will available:
- Current workflow step
- Reviewer name
- Date and time of submitting the review
- All the sections of the review form as they were submitted by the reviewer
.png)