Audit history
Entity audit history allows you to view every version of the entity and diff for changes in versions. Audit history is available for catalog objects (attribute changes are versioned with their object), glossary terms and test cases. It is opened via the History segment in the entity's detailed view header - hovering it shows who created and last modified the entity.
An entity that has been deleted but still has history is marked as archived in its history view.
Deleting version
Admin users can delete a specific entity version, by clicking on the 
button. Keep in mind that existing versions won't be re-versioned.
Comparing versions
Click on any row in the audit history table to open diff view. 
Restore older version
If you have entity editing privileges, you can restore an older version of the entity, by pressing the "Restore version X" button