Comparing sessions using the Edit Log is useful to check differences that are hardly visible on screen, such as overprint or trapping settings or changes in (hidden) layered objects.
To compare sessions using the Edit Log
The first snapshot is opened and the Enfocus Certified PDF Edit Log Navigator appears.

The Edit Log Navigator displays only the changes for the current page in the document. If you go to another page in your PDF document, the Edit Log Navigator adjusts the list of changes to match the new page.