The Do Not Disturb button looks like a crescent moon. Here is where you can find the button to turn Do Not Disturb on and off: Mac: Click the Control center icon at the top-right menu bar, then click the moon shape icon next to Do Not Disturb to switch it on/off. iPhone: Swipe down from the top-right corner of your iPhone's screen to open Control Center (iOS 15), then click the moon shape icon next to Focus to turn it on/off. Samsun: Swipe down from the top of the screen to open Quick Settings, then tap the minus icon next to Do Not Disturb.