To keep things simple. The marks on the side of the staff are a vernier scale that can be used to make .010″ graduations. You can look up the vernier scale on Wikipedia and see how it works if you have ever used on before.
A .010″ graduation basically equals a 1 minute of angle move, or one inch per hundred yards to the target.
There are 5 marks on top of the elevation knob and they represent 1/2 minute of angle each for fine adjustments that can be made without the aid of a magnifier.
For windage adjustment, the right hand knob is graduated. Each little mark is equal to 1/4 minute of angle just as most good scopes are. Every 4th little marks is numbered just so you can keep track of where you are in the rotation of the knob.
You can see the lines on the back of the staff at the bottom that were kind of dim when you got the sight. Those lines in conjunction with the center line on the body of the sight will tell you how many complete turns of the windage knob you are from center. Each complete turn of the windage knob is 3 minutes of angle, so if you are 4 lines from center then you would be 12 moa from center.
In use you adjust the sight till the elevation is correct for a specific distance and note where the lines are on the vernier scale and keep track of that sight setting in a note pad. Do the same for the windage, but the windage will vary according to how the wind is blowing.
The picture below is my sight set for 300 yards. It is set to .45 My current load is 1.6 moa/10 yds.