Novel sets every paragraph as you type it, with the care of a printed novel. Lines break the way a typesetter breaks them, words hyphenate where they should, and no line is left stranded at the top of a page. Quotes curl, dashes join, and each chapter opens with a drop cap.
Choose a trim, the 5.5 × 8.5 of a paperback, the 6 × 9 of a hardcover or one of your own, and that is the page you write on. One page or two facing, in Literata or Source Serif, light or dark. What you see is what the PDF prints.