Format chapter and section titles with actual heading styles instead of manually changing font size and weight. This creates a consistent document structure that layout software and ebook converters can interpret. It also lets an editor update the contents without rebuilding every entry by hand.
Review the heading hierarchy so sections are nested logically and do not skip levels without reason. Consistent styles improve navigation for all readers and support assistive technologies in digital publishing. Save a clean master file before exporting to production formats.