Fitts’ Law from the KDE User Interface Guidelines
- Bigger Is Better for buttons, especially on toolbars.
- Use screen corners and edges.
- Macintosh-style menus are faster than Windows/Unix-style, because they’re on the screen edge.
- Never put a one-pixel non-clickable boundary around buttons on the screen edge.
- Circular (pie) popup menus are faster than linear popup menus.
Because they can’t be repeated enough.