There is a dial on the unit that allows you to change the spacing of the red dots. THe top one stays put and you have several choices of how far appart the next two down are. If you have a very fast bow you use the dots that are very close together...the slower the bow the farther appart they are. They even have a few choices where the gap between the top and the middle dot is closer than the gap between the middle and the bottom (for very slow bows or very heavy broadheads) It is a selection of several gaps, not individualy adjustable...still very cool
Wyvern