"Chapter breaks" refer to the points in a book or text where one chapter ends and a new one begins. They help divide the content into smaller sections and signal transitions in the story or topic being discussed. Full definition
You'll probably have to add chapter breaks, which was explained a few paragraphs ago. (maketecheasier.com)
First thing's first, I had to separate out each chapter with formal chapter breaks. (kaitnolan.com)
The other major library system I use, Overdrive's Libby, has a few excellent features as well, including some implementation of chapter breaks and bookmarking which are very useful when you get to books over 100 pages, but is missing a few useful features. (comicsbeat.com)