How do I change the order of the chapters in my book?

Open the book's workspace and click Reorder in the Manuscript header. Drag any chapter by the grip on its left, or use the up and down arrows, and watch the new numbering appear as you go (a moved chapter shows "was Chapter N"). Click Apply new order when you are happy, or Cancel to discard. BookyAI renumbers the chapter headings for you ("Chapter 3: Dusk" becomes "Chapter 1: Dusk"; titles without a number are left as they are) and moves everything that belongs to each chapter along with it: its version history, originality and grammar reviews, references, story threads in the Codex, the audiobook order and any translated editions. The change happens in a single step: if anything fails midway, the book is restored exactly as it was. Reordering is not available while the book is generating.