FRST OF ALL ,GET YOUR SIDE DISTANT TO NO MORE THAN 60 TO 75 FEET ON SMALL UNIT.NOW AS YOU GO OVER A AREA YOU LIKE,HIT CURSOR AND STOP MACHINE,THEN HIT MENUE AND THEN ADJUST IT UP AND DOWN TILL YOU LIKE THE SETTING,THEN GO TO ANOTHER SPOT AND DO THE SAME,AND AS FOR SEEING BRUSH PILES THAT ARE NOT IN WATER COLUMN,THEY CAN BE HARD TO SEE IF THEY ARE OLD,YOU WILL NEED TO TRAIN YOUR EYES TO LOOK FOR A LITTLE WHITE WITH A SHADOW BEHIND IT,MANY TIMES IT WILL BE THERE BUT UNTRAIN EYES WILL OVER LOOK IT,PRACTICE,PRACTICE,PRACTICE IS NO SUBSITUTE FOR IT,GO WITH OTHERS WHO HAVE SI ,DOES NOT MATTER WHAT BRAND