Learn how to change chapter levels in your ebook.
Change a Chapter's Level
- Select the chapter or subchapter that you want to move to a new parent.
- Click on the drop-down box at the bottom left corner of the chapter menu.
- Select the new parent chapter. Root will make it a top-level parent chapter.
And then you're done.
If you haven't already, read Chapters and Pages in Ebooks to understand chapters in EPUB .