pattern board aim point?

when shooting at the pattern board do you cover the dot or aiming point on the board or do you touch the bottom of the aiming point? maybe it doesn't make much difference??

 

Doesn't matter, when shooting @ a pattern board all u have to do is shoot 3 shells at the target and you should be concerned is that the center of the pattern is directly above where u were aiming, then go to a trap field set a machine @ straight away targets and adjust for smoke

That is how Dennis DeVault taught me how to pattern my guns