Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to adjust rainbird sprinklers [title] Set the fixed left edge on the sprinkler head. [step] Before you adjust the watering direction or distance, you will need to set the starting point for the water rotation. Find the center cap on the rotor case.

Ending1: Follow the cap adjustment steps for the front or right edge. [title] Label the water level in the rotor case. Ending2: Move it all the way to the right until it stops and you can no longer turn it. Then, move it to the left until it stops. Ending3: Adjust the fixed point in the rotor case so that the range is concentrated in one area, rather than in several locations. [substeps] If you do not have a fixed point set available, you can find a kit or online installation program that you can use. Ending4: Push the dowel the opposite direction or distance away from the opening and down about an inch. [title] Regulate the water speed using the contact tool.

Answer format: ending1/ending2/ending3/ending4