Thats a vast question... if bow is mounted and we are talking abouit pins as above than as mentioned above follow your arrow ..move pins to arrow impact to center in the gold...EX if arrow is impacting high / right
..move complete sight ring right horizontially and sight bar up ...
I always say "Follow the rainbow to the gold"..meaning follow arrow to move to center of gold on target.
Now if your asking how to set a sight up out of the package ...that all depends on the sight...if it has 1st , second and or third axis...if it has options on mounting bracket etc...
if your sight allows it...moving it out away further makes the pins clearer or easier to focus in your Peripheral vision...however too far from riser on bow and its harder to fit in hunting bow cases and becomes an obsticle in thick bush...
if you have a level and want to use it on bow it has to be leveled to bow...at full draw at best...
if you have a 3rd axis sight...here's where it gets technical again...
Leveling your 3rd axis keeps your bow in perfect vertical alignment, giving you pinpoint accuracy when shooting on all different terrain. Leveling your sight in a vise or on a 3rd axis leveling jig might get you pie plate accuracy, but for true pinpoint accuracy the leveling has to be done at full draw. Leveling at full draw takes into account the torque of the bow, which is important. We have taken a sight that has been 3rd axis leveled using a vice or jig, put it on the bow and with our shooting machine the Hooter Shooter can show 2 - 4" discrepancies on a 40 yard uphill shot. Then we leveled the sight, at full draw, and got no discrepancies on an identical shot. 3rd axis leveling, at full draw, is a detail that is often overlooked when setting up a bow. But is obviously important when asking for perfect results on a perfect shot..
using a standard hunting sight with only two mounting holes no 2nd and third axis...simply attach to bow and shoot three arrows at ten yards that will tell you simply to "follow the rainbow"....
may sound difficult but it really isnt...
Hint8 most dealer will attach and set up sight close when you buy a bow...when we sell a bow and accessories including sights we dont let the willing customer leave with 3 consecitive arrow in the gold..
Neil