Step 1The sideline box: 3 inbounds at the free-throw line extended with X3 on the line, 1 at the ball-side elbow, 5 at the weak elbow, 2 on the ball-side block, 4 on the weak block. Why the box is inside the lane on a sideline play: the screens are set where the defenders stand, and on a sideline entry they stand between their men and the ball.