When working on a notebook with others, you can look back to see who made changes and when.

On the History tab, click.

It can be turned on and off by clicking the Hide Authors button.
The initials of the person who made the change appear in tiny notifications that appear on the right.
Then select Find by Author.
A list of each person who has made a change is displayed in the search pane.

To view the changes for a name, choose it.
To move to a change, click on it.

 

You can locate edits by the date they were made in addition to searching for them by the person who made them.

On the History tab, select Recent Edits.
Choose a time frame.

Select a date to jump to the page.

Close Search pane.