That's just the height of the kneebar. You should adjust it so it is just resting below your knee cap (patella or something). There are 4 hex bolts holding a plastic thing where the calf pad is. Loosen those (you might want a wrench/spanner or something on the other end for this to work), adjust to your preffered height, then tighten back up. Simple.
Hope this helps and hope it was what you meant, Luke