Page history: Restoring older versions of a Story
All the changes made to a Story are logged and easily accessible. To access, click on the arrow on the Publish button {1} at the top of the page while inside the Story and select Page History {2}.

In the new window, you can view all the different page versions on the right side {1}, described by Author and Time. The left panel shows a detailed changelog of each version {2}.
The highlight colors describe the nature of the change:
Red: Older content was deleted {3}
Blue: Older content was changed {4}
Green: New content was added {5}
You can restore an older version of the Story by first selecting the appropriate page version, and then clicking on the Restore button {6}.
