The message you're replying to did not mean that "ctrl-s" is literally the only input, but implied the whole file saving workflow that begins with "ctrl-s". The

The message you're replying to did not mean that "ctrl-s" is literally the only input, but implied the whole file saving workflow that begins with "ctrl-s". The fact that you're pointing out that the other interpretation is ridiculous is enough of a context clue to realize they're not likely to be saying that.