Article · 5 min read

Fitts's Law

Jon Yablonski · Laws of UX Free Beginner

Why your primary button should be big and easy to reach, especially on mobile. The time to hit a target depends on its size and distance, which directly shapes where you place the main action on a screen. Read it before you shrink a call to action to make room for something else.

  • Bigger, closer targets are faster and easier to tap
  • Put the main action where the thumb naturally rests
  • Small or crowded buttons cost you taps and cause errors
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The question it answers

  1. What are the psychology 'laws' behind good UX?

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