How to Open OneNote Package (.onepkg) in Outline
What is OneNote Package
OneNote Package is a file with .onepkg file extension which contains archived copy of your OneNote Notebook. It can be made only in OneNote on Windows.
You can learn more about ways of exporting your notes in this article.
How to Open OneNote Package in Outline
Please note that your changes in Outline will not be synchronized with the original .onepkg file contents.