While one can navigate to the parent folder when in preview/edit mode on a Box Note by clicking the ellipsis, it's not obvious to those that don’t know about it and can’t find it.

This lack of navigation is likely because of the reliance on using tabs to differentiate notes from the rest of Box. However, this has its shortcomings, as it relies on opening up notes from within Box. I have some bookmarks that go directly to a Box note, so I could never before find a way to get out of the notes view when opening notes this way without modifying the URL directly in the browser.