talking about the hammer spring adjuster?
you want the gun handle forwards, but NOT cocked/loaded. The hammersping has to be loose, else you will scar the the adjustment wheel,
So do not have the handle pulled back, nor have tension on the spring.
In general, never do any kind of adjustments with a gun loaded or cocked or tension on the hammer spring, unless the manual states otherwise.
Uncocked is the state a gun is in after you have taken a shot. when you pull the handle back, it puts tension back on the hammerspring and locks it, the gun is now cocked.