I'm sorry MEB this is the typical reply of someone who works almost exclusively on-screen. Any printshop requires high DPIs, I've noticed myself that when you introduce a low-DPI image (say a logo or something from a third party) into a high-DPI environment AP retains it as a low-DPI layer resulting in loss of sharpness when printing. And I'm sorry Gumbo23 I've tried most of the solutions given above but the only that REALLY works for me so far is upping the DPI in Gravid Converter (under Picture>> Resolution. It does indeed change dimensions then) before introducing the image in AP