Text spacing
The ability of a page to stay readable when a person increases line height, letter spacing, and paragraph spacing.
Text spacing is the space between lines, letters, words, and paragraphs. Some people with dyslexia or low vision read far more easily with more of it, and use browser settings or extensions to add it. WCAG’s Level AA text spacing criterion asks that a page lose no content or function when line height is set to 1.5 times the font size, paragraph spacing to twice the font size, letter spacing to 0.12 times, and word spacing to 0.16 times.
The failures are predictable: text that overflows a fixed-height box, buttons whose labels get cut off, and overlapping lines. Letting containers grow with their content fixes most of it.
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