An image 200 shown in FIG. 4B 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=false.??? In this case, when specifying the color of the FIG. 201 as ???special color:100??? and the color of the FIG. 202 as ???C:100, M:0, Y:0, K:0,??? the color of the FIG. 202 is employed with respect to a