Pull the nozzle tree off the top of the sprinkler. Grasp the stem and pull upward to remove the tree.
Hold the top of the Rain Bird 3500 sprinkler head and rotate it clockwise to adjust the nozzle spray direction. You can adjust it to a minimum of 40 degrees and a maximum of 360 degrees.
Insert a flat-head screwdriver into the hole on the top of the nozzle head. Turn clockwise to increase the spray arc. Turn the screwdriver counterclockwise to decrease the spray arc.
Remove the screwdriver and replace the nozzle tree.