I've a slightly different opinion than Cossack, although he was spot on in most of his post.

The directions say to sight in at 20 w/ crosshair. That poi won't change w/ those arrows and string regardless of what you do w/ speed dial.

Next is 40 yds, the 2nd triangle below xhairs. Adj speed ring until that is on, then check 30 and 50. You may have to tweak speed ring, life will stay simpler if you leave the turret adj's alone. The closer you get to "perfect", the smaller the adjustments on speed ring. It can take some patience.

The upside down triangle above crosshair is 10 yds, and the two on horizontal hair are the leads for a walking deer at 20 or so yards.

I use pieces of electricians tape for sight in targets, one vertical and the other horizontal so I'm only working on one plane at a time.