Range or Change Elevation. To announce range, extend the arm toward the leaders or men for whom the signal is intended, fist closed; by keeping the fist closed battle sight is indicated;
by opening and closing the fist, expose thumb and fingers to a number equal to the hundreds of yards;
to add 50 yards describe a short horizontal line with forefinger.
To change elevation, indicate the amount of increase or decrease by fingers as above; point upward to indicate increase and downward to indicate decrease.
What range are you using? or What is the range? Extend the arms toward the person addressed, one hand open, palm to the front, resting on the other hand, fist closed.