PURPOSE: To enable numbers or marks for arrangement to be confirmed but not to be left on a negative or positive image for printing to be formed from an original by using a light source for emitting exposure light having wavelengths not absorbed with a fluorescent dye or pigment used for forming the numbers or marks for arrangement.

CONSTITUTION: A photographic film is developed to form a negative film corresponding to each original. Next, the negative film is printed on a photographic printing paper and developed to form a positive print corresponding to each original. A number or mark for arrangement is written on the obtained print paper on the front side of the image with the fluorescent dye or pigment. This dye or pigment is selected in association with the wavelength of the light source to be used for photographing the layout sheet to which said print is applied.