This floored me: when the app decides you typed an emoji, you can undo (ctrl+z) to get back to what you actually typed. That never would have occurred to me to

This floored me: when the app decides you typed an emoji, you can undo (ctrl+z) to get back to what you actually typed. That never would have occurred to me to try, simply because the mental model I have of "undo" pertains to things I did, not the app.