The outline feature in OneNote makes quick work of organizing long or complex documents, plans, and presentations. It can organize up to five levels of information, and it starts to assign a hierarchical structure to your notes as soon as you indent one paragraph under another.
You can promote or demote items in the outline hierarchy by changing their indentation. You can also organize information into headings and subheadings, apply numbered and bulleted lists, and control which levels of information are displayed.
As you type each additional paragraph below the next, increase or decrease the indentation position to either raise or lower the hierarchy of a particular paragraph.
Note: Each new paragraph you create automatically continues at the same level as the previous paragraph unless you increase or decrease its indentation.
In large outlines, adding bullets and numbering will give you a more detailed structure.
One of the benefits of structuring notes in an outline format is that you can hide sublevels.
You can expand an outline the same way. Double-click the small gripper icon again.