Abstract: A method is described for indicating a curved line on a display panel of a computer device provided with a coordinate designation device. First, second and third position coordinates designated by the coordinate designation device are respectively set as a starting point, a terminal point and a handle point at the terminal point, connecting the starting point to the terminal point. A Bezier curve is indicated on the display panel of the computer device in such manner that each inclination of the Bezier curve at the starting the terminal points in varied in accordance with change of the handle point.