Hi!
i am getting subtle banding when i print a 12X18 print on the Unryu paper but i don't get it when i make a small print...
i tried both with and without "prevent paper abrasion" checked...i think it was better with prevent paper abrasion...
Are there changes i can make in my settings that will remedy this problem?
HELP! i need this print to be perfect by 3/15/17...

Sori,
For banding in your prints, the first step is to print a nozzle check. If all nozzles are clear and the check looks good, then move on to a printhead alignment. The step-by-step instructions can be found in your printer manual, you will need a couple sheets of standard matte paper to complete the process. You can find the manual here:

https://www.usa.canon.com/internet/portal/us/home/support/details/professional-large-format-printers/professional-inkjet-printers/pro-1/pixma-pro-1#manuals_tab

Hopefully this will get you back to flawless prints.