fron the luminous landscape link: (Resample Image) "If you check this box it decouples the locked relationship between Width and Height and Resolution and allows you to set them separately. If you turn this box on by checking it you can make the image any size at any resolution you like "Well", you might say, "That's pretty useless. What's the point"? Actually, if done in moderation this technique can allow you to make prints larger than your original image would normally allow. The reason for this is that a large print is viewed from a greater distance than is a small one and therefore the effect is masked."