- Margins are the safe zones inside the page where no text or images should be too close to the edge.
- Bleed is used when images or backgrounds are meant to extend beyond the edge of the page — it prevents white borders during trimming.
Most platforms require:
- A 0.125-inch bleed on all sides for full-bleed pages
- Margins adjusted for binding (wider on the inner edge)
These small details ensure your printed book looks clean and professional.