To help you stay organized, you can create subpages in OneNote on your iPad. You'll need to have a least two pages in the section before you can make one a subpage.
In the list of pages, tap Edit.
Tap the page you'd like to set as a subpage, and then tap the right indent icon at the bottom of the page list.
The page will become indented, and will be a subpage of the page above.
Tap Done when you're finished editing the pages.
Tip: You'll be able to see previously created subpages when you're using OneNote on an iPhone but you won't be able to create new subpages on that device. You'll have to use an iPad or computer.