Line height, also called line spacing, is the vertical distance between successive lines of text. It helps readers track their eyes from one line to the next and gives paragraphs enough breathing room to remain readable. section 5.5.1
Treat line height as part of an accessibility toolkit rather than decorative polish. Generous spacing supports readers with dyslexia and improves readability for everyone, especially when paired with shorter line lengths and comfortably spaced characters. section 5.5.1 section 5.5.2
Practical guidance:
- Allow enough vertical space for the eye to find the next line without losing its place. section 5.5.1
- Combine loose line spacing with shorter line lengths and loose character spacing when optimizing for inclusive readability. section 5.5.2
- Keep content usable if users apply their own spacing preferences or accessibility styling. section 5.5.1
