A well-structured interior gives every element a clear role. Headings establish hierarchy, body text creates reading rhythm, and spacing helps readers understand where one idea ends and another begins.
Paragraph styles keep repeated elements consistent across the manuscript. Chapter openings, quotations, lists, notes, and captions can then follow an intentional system rather than one-off formatting.
Page decisions are checked across facing pages so alignment, white space, and repeated elements work together throughout the book.