How to check for recent changes in a Class Notebook
Class Notebooks will change frequently. Therefore it is important to look for changes, added pages, etc.
The simplest way to track changes is to click the purple clock icon on the left of your OneNote app.
The list will show pages that have just been created or updated in the Notebook.
Futher, bold sections and page names are either new or have changes that you have not opened yet. It's like new emails in your Outlook inbox.