Jeannette

i have a ip7220 and try to print on disc printable, i have trouble with the measurement because on the template , the number that i wrote changed by them selves, i want to know the meaning of the measurement that i have to do is it from the externe plate , of the plate that i p ut on the printer . it does not correspond with the a4 that it shows. on the screen. i just want to know how to do that. print on printable disc, with pixmaip 7220. i search for a solution