Three pins set to 20, 30 and 40.
If you're new to the sport then spend some time and try out the bow with each of your pins.Like try your 20,30 and 40 pin standing at the 20 yard mark... Then the same for 30, 40 and so on.
Also, make sure you have a bubble on your sight to visually keep your bow centered. Otherwise, when you tilt/cant the bow then that will affect your accuracy.