Without knowing more about the crossbow it is had to help you out; IE: brand, type, scope, single pin and peep etc. Paper tuning really doesn't apply toxbows there are really no adjustments other than the sighting system; though you can, and should, adjust the brace height on a recurve crossbow. Any meaningful adjustments are made to the arrow in the form of balance (Front Of Center) and fletching. The manufacturer should specify the brace height if applicable to your specific crossbow.

For a crossbow to get its best accuracy it must be cocked evenly so the string stays centered. In order to do that most use a cocking rope with pulleys that ensures that the string stays centered. If you are cocking it by hand use some white out or a marker to mark the string on both sides of the rail. This will allow you to look at the string and see if it is centered.

I hope that this info is of some help. Welcome to the world of xbows.

Bob