Aha! Ideas | Track history and restore historical versions
The text editor tracks the history of changes made to a note or record description. To view the record of changes and the user(s) who made them, click the View history icon on the text editor toolbar.
During a collaborative session that involves multiple users, each user that modified the document will be displayed in the history of the record.
To restore a previous version, simply select one of the historical versions of your document and choose Revert to this version.