Well, it depends on the type of sights. For open sights(no scope) if the bullet hits to le left of where you are aiming, move the rear sight to the right. If the bullet hits high, move the rear sight...
Unstring the bow carefully pry the string apart count the strands then place the peep in so you have half the strands on each side then put it bk on the bow draw it to check for position gently come...
Windage is adjusted using the knob on the right rear of the carrying handle/rear sight mount. There are two elevation adjustments. For the purpose of zeroing the weapon in, you would raise or lower...
If the sights are fixed, they can't be adjusted. You would either need to replace them with adjustable sights, or else use the "Kentucky windage" method of compensation.