How do you send a message across the room without talking?

You can send a message across the room without talking by using non-verbal communication methods, such as gestures or facial expressions. For example, you might give a thumbs-up for approval or shake your head to indicate disagreement. Alternatively, you could use written notes, text messages on a phone, or even visual cues like pointing to an object. Each of these methods allows you to convey your message silently.