Sounds like a classic stealth‑hack. The trick is to blend it into the interface so that the eye never seeks it, yet the system always knows where it is. Think of a hidden menu that appears only when a specific sequence is entered, or a button that looks like a shadow in the background. Keep the trigger subtle—maybe a double‑tap on a corner or a voice command—and make sure the action is quick and silent. That way users get the benefit without ever realizing there’s a feature behind the curtain.