OneNote doesn’t have a Save button. That’s because you never have to save your work in OneNote, like you do in other apps. However, if you want to share a snapshot of some of your notes without giving someone full access to all of them, you can export any page in your notebook as an Adobe PDF (Portable Document Format) file that can be sent to and viewed on any computer or mobile device.
For example, you might want to share a handout with a colleague who doesn’t have OneNote or who doesn’t need to see everything else in your notebook. Or perhaps you need to hand in your working notes with a class report. In such cases, exporting notes as a PDF file is useful.
Do the following:
In OneNote, go to the page you want to save.
On the File menu, click Save as PDF.
In the Save As dialog box that opens, type a file name and choose where you want to save the file.
Note: When you save notes as a PDF file, you’re saving a static snapshot of those notes. Any changes to those notes that you later make in OneNote won’t get changed in the PDF file you created.
PDF files you create with OneNote can be viewed and printed on your Mac with the free Adobe Reader software.