This appendix collects references to all the design rules developed after Chapter 1.

Rule of Optional Color: Use color to emphasize, but never convey information through color alone; combiine it with other cues like shape, position, and shading.

Rule of Large Menus: One large menu is more time-efficient than several small submenus supporting the same choices.

Rule of Target Size: The size of a button should be proportional to its expected frequency of use.

Rule of the Infinite Edge: The easiest target rectangles on the screen are those adjacent to its edges.