A reviewer fo c890 wrote that a photo printed at 720 dpi and at 1440dpi looked the same at 12 inches distance by eyes. Only with a magnifyer could one pick the difference. My driver-ware gives the choice of photo or super photo [or words to that effect]. Can I set the dpi by setting the resolution level in Photo Shop as 300dpi, 250, 200 etc? How to translated this into equavalent 720/1440/2880? Otherwise, how can I pick 720dpi and 1440dpi. I don't see such options.