Collavate Revision History
Collavate Workflows provide Revision History. To locate the Revisions tab, click on an existing workflow. The revision tab can be found on each workflow processed after the feature's date of release (August 2017).
Users can download file versions as permanent record of PDF file by clicking the download icon on a version number. Workflow participants can also leave comments on each revision to make notes of edits and changes.
When each workflow participant makes edits to a workflow file, a number of edits will appear on the contributor's revision history.
When viewing a non-google file (such as .pdf, .xlsx, .png),users will see a lock icon in the top right corner of the Revisions Box. Clicking the lock will keep the current version as is. Unlocking the lock will allow you to continue update the file.
The revision number allows users to see how many revisions a particular user made to the document.