Getting to know "Version History"
Select the "Version History" icon to open: 
(Only Editors or Managers can access )
The current, and all previous versions will appear on the left panel:
- Select a version to review and/or compare between versions.
Select "No Comparison" to show the version without any comparisons.
Select "Compare to Previous" to highlight new updates (in green) and any deleted content (in red).
Select the "Compare to Current" to compare a previous version against the current version.