I can't print from my PC windows 7 to my hp printer photo tray for 5x7. This is a replacement printer from HP and I had to download the driver from the Web. How do I switch to the photo tray to print 5x7. I have a 6520 and it will print from the photo tray for 4x6 and 5x7. I tried another computer to print to th 7520 photo tray without success. I am not a techy person and I don't know how to resolve this issue.
Thank you