Adjust each setting and see the visual result alongside the research behind it. Find the balance between aesthetics and reading comfort.
16px minimum for body text on screens (WCAG 2.1)
1.5-1.7 optimal for body text (Ling & van Schaik, 2007)
45-75 characters per line optimal (Bringhurst, Elements of Typographic Style)
Slight positive tracking improves readability at small sizes (Arditi & Cho, 2005)
Increased word spacing aids readers with dyslexia (Zorzi et al., 2012)
Regular weight (400) optimal for extended reading
Adequate paragraph spacing improves text navigation
Typography is the craft of endowing human language with a durable visual form, and thus with an independent existence. Its heartwood is calligraphy—the dance, on a smaller page, of the living, speaking hand—and its roots reach into living soil, though its branches may be hung with dead conventions.
The reader's comfort is not a luxury but a necessity. When text is set with care—when the spaces between letters breathe properly, when lines are neither cramped nor sprawling, when the eye can traverse a line without fatigue—reading becomes what it should be: transparent. The reader forgets the page and remembers the ideas.
Research in typography and human factors has given us concrete guidance. We know that line lengths between 45 and 75 characters optimize reading speed and comprehension. We understand that line height affects both legibility and aesthetic harmony. We have measured the impact of letter spacing on readers with visual impairments and dyslexia.
These are not arbitrary rules handed down by tradition. They are principles discovered through careful observation of how human eyes and brains process written language. When we set type according to evidence, we honor both the reader and the text.
