I could have used this a few days ago at the range! S&W doesn’t put “turn this way for down” on their sights, so having a diagram is handy. Or you could use the completely idiotic mnemonic device “Clock-DAR” which stands for “clockwise down and right” because turning the adjustment screws clockwise will move your point of impact down or to the right, respectively.
You can remember it by Clockwise Drrrrrrrr as in derp derpity derpin’ derp.
Good info, but I always carry a S&W revo/ pistol manual in my range bag when practicing.