Like the image 200, an image 400 shown in FIG. 5B is an image in which a FIG. 201 is allocated so as to overlap in its upper part with a FIG. 202, wherein the overprint attribute of the FIG. 202 is set to ???OP=true, OPM=1.??? In this case, a portion 410 where both figures overlap results in the color of ???C:100, M:0, Y:0, special color:100,??? which is obtained by combining the colors of the two