Cheat Sheet about readability

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Readability describes, how easy text can be understood.

There are some numbers which help assess it:

  • Simple words and sentences are easier to get than longer paragraphs
  • Difficulty level (e.g. Flesh-Kincaid index or Gunning fox)
  • Line length
  • Kerning
  • Tracking
  • Alignment
  • Leading
  • Hierarchy
  • Contrast

I'll explain the typographic terms above in another place and a link to it.