metadata
group: Design Patterns
type: Principles
order: 7
title: Keep it Lightweight
Fitts's Law is an ergonomic principle that ties the size of a target and its contextual proximity to ease of use. In other words, if a tool is close at hand and large enough to target, then we can improve the user's interaction. Putting tools in context makes for lightweight interaction.
Fitts's Law:
The time to acquire a target is a function of the distance to and size of the target. It is proportional to the distance to the target and inversely proportional to the width of the target.
Always-Visible Tools
Hover-Reveal Tools
Toggle-Reveal Tools
Visible Area ≠ Clickable Area
