It is a desktop draw tool, can lock desktop,and draw line on it free,you can set line's color or width.Clear the points(lines) that you drawed(when you clear on Desktop,it will be magic)!,for education,demo,explaining,for doodling too.1.Draw on your desktop; 2.Draw on a "pure paper"; 3.Rubber tool; 4.Double mouse click to Clean them; 4.Spot light tools