Before the serve
Zone 1 is to the right of zone 6, zone 6 is to the right of zone 5, and the front row stays in front of the matching back-row player. Place six players so those neighbors are legal.
The switch
Draw the movement that starts as soon as the serve is contacted. The setter runs to the target. The hitters take their pins. Use a second color so the serve-receive spots and the attacking spots are not the same marks.
A common fault
Write the overlap you do not want, such as the setter starting to the left of the middle back. One illegal picture, clearly labeled, prevents the argument on the court.