To obtain a natural operation feeling and natural output result such as writing with a pen or brush, or as erasing with an eraser without special mode setting operation and to save the labor for this operation in a device which is provided with a drawing function.

Drawing information parameters, which are stored in a coordinate information storing means, such as color, width, transparency of the line of the drawing, and area for the drawing, are altered according to the moving amount of a coordinate input device per unit time.