Clearly, I'm missing something critical in the chain. I've scanned an 8x10 negative and worked it up to my satisfaction in Photoshop. I resized the image to 16x20 and set the paper for 17x22. In advanced settings, I've chosen B&W Mode with a cool tone. The print is beyond my expectations, save for one tiny detail. It prints out at 12x15" in the corner of the 17x22 sheet. It's a gorgeous 12x15 (by my somewhat limited standards), but it isn't what I asked for and it isn't what the Print Preview says I should be getting. It is precisely 75% of the image size I configured. Can somebody tell me what I screwed up?