Holder with mils

You may want to re-phrase your question. If you need to hold 2 mils right you hold 2 mils right. If you need to hold 2 mils down you hold 2 mils down?

I don't understand what hold means. Say you missed a shot with your crosshairs on the target, and you need to hold two mils right. Does that mean you match the target 2 mils to the right of center, or two mils to the left of center. If you need to hold two mils down, do you match the target two mils above or below of center?
 
So you take a shot. You see the impact of the bullet and it's off the left (your left) side of the target. Then you take the crosshairs and move them to the right, essentially making the spot in your scope where the bullet impacted your "new" crosshairs. Same thing if you impact low. You then raise the crosshairs so you now put where the bullet impacted in your scope over the target and reengage.
 
So you take a shot. You see the impact of the bullet and it's off the left (your left) side of the target. Then you take the crosshairs and move them to the right, essentially making the spot in your scope where the bullet impacted your "new" crosshairs. Same thing if you impact low. You then raise the crosshairs so you now put where the bullet impacted in your scope over the target and reengage.

I understand the process but what are the terms, you missed to the left 2 mils so you have to move the scope to the right 2 mils. Are you holding 2 mils left or two mils right? I don't know which way moving the scope relates to holding.
 
it's holding the difference instead of dialing it.

Example:

You line your crosshair up center on a target and the bullet impacts 2mils to the left. you now know you need to adjust 2 mils.
Instead of reaching over and dialing in 2mils, you simply slide the crosshair off the right side until you have the 2nd mil on the center of the target....where you were originaly aiming.
 
Here is a simple way to keep it simple....
Spotter should always assume the shooters crosshairs are centered on target so the spotter should always call out the correction only . This makes it easier on the shooter ......shooter will fire shot then listen to spotter make the call being the correction and then shooter adjusts and fires 2nd shot......example : So the spotter sees an impact that is 2 mils right of center target where shooter was aiming, so then spotter should say hold or come 2 mils left and send it. Simple way to communicate where the impact was and where the correction should be in one quick exchange.
Shooter can always adjust better and faster from being told the correction not the impact point.