How do I restore a OneNote page or a previous version?

If you want to go backwards in time on OneNote to access a previous version of a page in onenote you need to do the following:

1. Open your web browser
2. Browse to portal.office.com
3. Open You're OneNote note book in the webbrowser
4. Right click on the Page for which you want to view a previous version
5. Select Show Versions
6. This will (after a while) show dates of when you made edits
7. Select the date from which you want to restore from
8. Copy and paste the changes you lost into the current page