“If nothing happened, you probably did not press the button quickly enough the second time.”

I like learning new things, and I like learning new old things. I was looking at Apple Human Interface Guidelines from 1987 and this passage caught my attention: The most common use of double-clicking is as a shortcut way to perform an action. For example, clicking twice on an icon is a faster way to open it than clicking once to select it, then choosing Open from the File menu; clicking twice on…