| In Photoshop, you can crop your picture to the final dimensions and resolution, then change the canvas size to the print size.
For example:
if you want a 4" X 4" picture to print on a 4 X 6 without losing the top and bottom:
crop to 4" X 4" @ 300 dpi
Change canvas size to 6" X 4"
save as jpg
You will see your square image with white panels on the left and right which is what should print.
Keep in mind the fact that most labs will process a bit of bleed to be cropped off, so you might lose 1/8" or so from the edges. To overcome that, simply make your image 3-3/4" X 3-3/4" and your canvas size 6" X 4".
Gerry |