LNB's aiming point

Hi! I have device ready for checking where exactly LNB is pointing. Why it is important.... because, without pointing to right point you will never get maximum of your antenna. Sometimes, even on brand new antennas central LNB is not in the correct position. Of course, it is still possible to tune this antenna to maximum signal, but, unfortunately this maximum could be not real maximum.
Another question is how to find out where LNB should be pointed. On PFA aiming point is directly in...

LNB's aiming point