I am using windows XP at my workplace. I am having several computers all connected via network. I wanted to print many documents everyday so I purchased HP Officejet 8500 pro wireless printer. It offers good print quality with g\many features as well as average printing speed. I am usually printing papers having A4 size so I wanted to default my printing to this settings, so I tried to change the paper size to A4 but it was set back to letter. So provide me with the solution on how to do this?