Back in the day, on the Amstrad CPC, there was a way to duplicate the cursor, move the duplicate around on any part of the screen and copy any text below the duplicate to where the actual cursor was. I always thought that this simple but powerful feature was missing on modern computers.

The submission is not equivalent but clearly can help avoid having to move your mouse around. Still wish I didn't have to modify the original command as, very often, I realize that I want to copy the command's output after I execute it.