You can track changes for each message node in your design on a per-field basis. This allows you to track who changed the button title, when was the change made and even see the previous values, even if they have been removed.
While in the Flow Editor or Mock Editor, click on the Edit icon on top of the message title and then click on Show Revisions:
All the revisions or history of the fields present in a message node are maintained and are attributed to the user who created/changed them. This makes it easier for a team to keep track of changes made to any node by any user.
Note: Revision History is retained in our system for a certain amount of time based on your pricing plan. For details on pricing plans and features, click here.