1. A method of outputting through a photo printer an image stored in an image storage device, the method comprising: setting a temporary printing area on an image to be printed; determining whether or not an option for Paper-full printing is selected; if the Paper-full print option is selected, detecting a face area on the image; determining whether or not the detected face area is included in a printing area; and according to the determination result, adjusting a printing area so that the face area can be included in the printing area.