Turn off the sprinkler system
Locate the adjustment screw on the sprinkler head
Use a flathead screwdriver to turn the screw
Turn clockwise to reduce spray distance
Turn counterclockwise to increase spray distance
Rotate the nozzle to set the spray direction
Adjust the arc by turning the top of the head if applicable
Check the pattern after each adjustment
Repeat until the coverage is correct
Turn the system back on and test the head