lol in photo shop, you wont need to change the actual pixels just to print an image. Go to "print with preview" (crtl+p), there it will give you options for pic size and orentation on what ever size of paper you want. You can adjust the photo size on the paper by typing the size in the blank under "scaled print size" box. Actually cropping an image is a diffrent story. i am not exactly sure what u want to do. Also, at 300dpi print to find the supossed max print size of an image, you would divide the number of pixels by 300 and that would equal how many inches wide to high it can be printed at. for example, if you image is 1200 pixels wide and 900 tall, the this image would print at 300dpi 4in X 3in. I hope this helps, if not i will try agian.