Who starts where in our four-out example
1 and 2 start high, 3 and 4 in the corners, and 5 inside away from the ball. 5 leaves the driving lane open and offers a short pass or rebound.
Gels numbers the inside player 4 and second high ball handler 5. Our drawing uses 5 and 2 for those roles.
Source-backed summary; versions may differ.