What you'll do: create your own front- or back-matter page when none of the standard ones fit — for example a "Content note", "Map", or "Reading group questions".

Steps
- Go to the Matter step.
- At the bottom of the list, click + Add custom front-matter section or + Add custom back-matter section.
- A new section appears, tagged Custom. Click its name to rename it.
- Expand it to open a rich-text editor and add your content.
Manage it
- Reorder / move: drag it like any other section — see Reorder sections.
- Choose where it appears: set it for the e-book, the print PDF, or both — see Choose where a section appears.
- Delete: click the × on its row (only custom sections can be deleted).