Grasp dumbbell cable attachment. Stand facing side with resting arm toward low pulley. Grasp ballet bar if available for support. Internally rotate shoulders so elbows point out to sides.
With elbow straight or slightly bent, raise upper arm away from low pulley to side, slightly to front (30°) until upper arm is shoulder height. Lower and repeat. Continue with opposite arm.
Maintain straight or nearly straight elbow position with elbows pointing outward throughout exercise. If low pulley is fixed, turn slightly away from low pulley.
Also see comments under Dumbbell Front Lateral Raise.