User's Manual

OneNote Mobile
3. When finished, tap ok and the document/workbook/note is
automatically saved and named according to the first characters of text
entered in the document.
Opening a
Document/Workbook/Note/Presentation
Whenever you switch to an Office Mobile program, you will see the file list.
Tap the desired file to open it. You can open only one document at a time;
when you open a second document, the first will be saved and closed
automatically.