Determine the depth of the shallow cut that you'll place in the wooden wall.
Release the lever that secures the circular saw table in order to adjust the cutting depth. Slide the table down while watching the measurement etching on the depth slide.
Lock the saw's slide lever when the cutting table is at the correct depth. Place the end of a tape measure on the bottom of the table next to the saw's cutting blade. Read the tape measure to confirm the blade depth.
Rest the saw's table on the wall with the blade slightly raised above the surface. Squeeze the saw's power trigger and gently lower the rotating blade into the wall.
Slide the circular saw forward when the cutting table is flush against the wooden wall. Hold the circular saw with both hands while making shallow cuts into the wall.