The Samsung Galaxy Watch 3 app has arrived in the Play Store, and a look at its features shows new gestures to silence alarms, take a picture, or answer an incoming call, 9to5Google reported (via XDA Developers)
Rotating your wrist while wearing the watch will allow you to mute alarms as well as incoming calls, and clenching and unclenching your fist will answer a call. To take a photo or video with the Camera Controller app, make a fist, then open your hand.