Ever notice ...

... once in a while, while you're typing at your computer, using something like a word processor, you mistakenly hit an unintended, unexpected combination of keys ... and suddenly uncover some here-to-fore unknown feature of the software. A feature that is pretty cool. And one that you keep on using after that because it makes your work easier. That accidental set of keystrokes now becomes a standard part of your repertoire. That's kind of how natural selection works.