Microsoft OneNote 2016 version specifically refers to a late 2017 update for OneNote for Mac . While Microsoft has transitioned most users to the unified "OneNote" app, version 2016 remains functional for many, though official support for Office 2016 ended in October 2025. Core Structure & Organization
: The individual sheets within a section where you actually take notes.
: The highest level. You can have separate notebooks for Work, School, or Personal life.