The final adjustment is to sharpen the image. Every time you scale, rotate, or change the color of an image, you add slight blurring to it. This is in addition to any blurriness that existed in the image before you started working with it. You can compensate for this to a certain degree using the Unsharp Mask filter.

Choose Filter: Sharpen: Unsharp Mask. The settings for each image will differ, but generally the Radius and the Threshold will be under 5 pixels, while the Amount will be greater than 50%. Move the sliders for each setting while watching the results in the image.

The goal is to make the image appear crisper and less blurry without over-sharpening. Oversharpening can appear as "haloing" or mottling near areas where colors contrast sharply, or as an overall "plasticy" appearance.