Also, when you scale a photo up or down, it will always become fuzzy. Therefore, you will need to use some type of sharpening filter to make the photo crisp again. In Photoshop, there is a "Sharpen" filter and an "Unsharp Mask..." filter. The Sharpen filter sharpens every pixel and works best on small, thumbnail photos. On big photos, the Sharpen filter tends to make everything look pixelated. Therefore, for photos larger than 400 pixels in width or height, it is best to use the "Unsharp Mask..." filter, which adjusts the contrast of edge detail to create the illusion of a sharper image.