Typography (Wikipedia)
Wikipedia’s article on typography: definition and scope; legibility vs. readability as distinct concepts; typeface selection principles by content category; text composition (line length, saccadic rhythm, leading, justification, tracking, underlining); display typography vs. text typography; typography as tone/mood signal; digital typography.
License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/
Key points
- Legibility vs. readability: legibility is perception — how easily individual characters are distinguished from one another (e.g. b vs. h, 3 vs. 8); readability is comprehension — the ease of reading a whole body of text, governed by margins, word spacing, line spacing, line length, and structural clarity rather than the typeface alone.
- Typeface selection by content type: serif faces for long-form body text; tightly-fitted serifs for newspapers and compact layouts; sans-serif for short introductory or incidental copy; larger display type for headlines, where size and weight signal hierarchy before the words are read.
- Saccadic rhythm: the eye moves in discrete jumps, recognizing roughly three words per jump; lines requiring more than three to four jumps introduce strain and reading errors — the basis for line-length guidance.
- Composition variables: generous leading (line spacing) helps the eye track and return to the right line; ragged-right setting is more reliable than full justification, which needs careful hyphenation to avoid rivers of whitespace; underlining for emphasis disrupts descending letterforms and should be avoided; tracking and kerning are best left at normal defaults.
- Typographic “color”: the overall ink density of a text block, driven by typeface weight, word spacing, leading, and margin depth — a dense block feels heavy, loose spacing feels airy.
- Display vs. text typography: display typography (headlines, posters, packaging) can trade some readability for visual impact at large sizes; body text needs the opposite restraint, since small legibility flaws are magnified at scale.
- Typeface as tone signal: classical serifs suggest authority and permanence; geometric sans-serifs suggest contemporary neutrality; bold faces assert and attract attention — tone read before the words themselves are.
- Digital typography context: character encoding separates text presentation from content meaning, letting identical text reflow across devices; screen-specific constraints (anti-aliasing, pixel density, dark mode) introduce variables print typography never had to address.
Media: article images hosted on Wikimedia Commons; not downloaded, consistent with all Wikipedia ingestions.