How do I create and manage section groups in OneNote for Mac?

Create a new section group by right-clicking in the navigation bar and selecting New Section Group.
Name the new section group.
Right-click the section group and click New Section. This will create a new page in the group.
Rename the section by right-clicking on it in the navigation bar.
Move existing content into the new section by clicking and dragging it to the desired section.
To move sections, click and drag the section in the navigation bar to its new location.
To delete a section group, right-click it and click Delete.