paper coating

Hi, can anyone explain to me how to adjust the print centering with respect to the sheet and on both sides? 1. If I make the first X, Y adjustment, do I adjust the offset based on the correct front? 2. If I make the second adjustment for both sides, how does it work? Is the X, Y offset the same...

Hey everyone, I'm new here so this may be the wrong category - please let me know if I should post this somewhere else. I am an artist and I print my own giclees with the Canon Pixma Pro 10. I'm trying to figure out where I can buy a matte/gloss coating (must be archival quality) that I can...