Once you receive your Red Arrow Marker either online or at a course try thinking of it as your start process to putting. After you mark your ball focus on the line from the Red Arrow to the hole and walk all the way around the hole to get a better read of the green. You will see a better line and slope if any by walking all the way around the hole. When you are ready re aim the ball and marker to the line and make any final adjustments. Important: Keep your eyes above the ball in order to best visualize the line. Keep this specific routine every time you mark your ball and you will see lower scores and fewer putts. Your Welcome.