My sons keep popping the keys off of my Enermax KB007U-B keyboard, and I was having a hard time putting them back on. But this picture proved very helpful because it shows how the little, white scissor hinges (or whatever the hell they are) are supposed to be connected.
In case I need to remember that I did this...
By default, the Mac Terminal assigns the "Clear Scrollback" command to Command-K. This is annoying, because I often use Nano, which uses Control-K to cut a line of text, and I frequently press Command-K instead of Control-K by accident. This clears my screen while I'm in the middle of editing a file. Very annoying.
The solution is to assign a new (harder to hit by accident) command to the "Clear Scrollback" command, so that when I inevitably mistype Command-K, nothing happens.