Field officials will often signify a "first down" when the ball is seen by extending their arm in the direction the team in control of the ball is driving. The official indicates second and third downs by putting up two or three fingers, depending. If no one on the officiating crew has the ball, they will also extend their arm in the direction they think the ball was last spotted. This is very important on punt returns where the returner needs to know if he is returning home or away from the end zone. Showing your hand with three fingers extended means it's an away team, while showing your hand with two fingers extended means it's a touchdown and you should return it home. The extension of the arm is not meant as a signal for the defense. If the defense sees this gesture, they are supposed to adjust accordingly. In addition, field officers will sometimes use their hands to show where players are out of position. For example, if they see a wide receiver pushed out of his route, they may point their open hand in that direction to signal for the ball carrier to stop what he's doing and change directions. Finally, officers may use hand signals to call specific plays or adjustments on the field.