This article explains how to use hand gestures with the Galaxy Watch 4. We'll also explain which hand gestures the watch recognizes, how to use them, and what you can do with each gesture.
Enable Universal Gestures on Samsung Galaxy Watch 4 after OneUI 5 Update
The Galaxy Watch 4 supports gestures, but it doesn’t use the same gestures you may be used to from previous versions of the Galaxy Watch series. Your Galaxy Watch 4 also ships with most gestures disabled, so most of them won’t work at all unless you explicitly enable them.
The exception is the "raise to wake" gesture, which automatically turns on the watch display when you raise your hand to look at the watch. However, that gesture can be disabled if you find it uncomfortable.
Once you enable a gesture, you can use it by moving your arm or wrist in the specified way.