How to Sign "Turn Off"
To sign 'turn off,' hold your dominant hand in front of you and form an 'F' handshape, with your thumb and index finger touching and your other three fingers extended. Twist your wrist inward (towards your body or to the left), mimicking the motion of turning a dial or knob to the 'off' position. This variation is specifically used for turning off devices with knobs or dials.