You might wonder why this filter is called the "Unsharp Mask" - rather than something simpler like the "Sharpener." This is because you are literally masking out the unsharpness. By changing the brightness and contrast values in certain areas of your image, this filter makes objects appear sharper.
All you have to do to apply this filter in Photoshop or Photoshop Elements is to go to the Filter menu. Next: Select Sharpen, and then Unsharp Mask.
Everybody disagrees about which settings are best. I usually prefer to keep the Amount below 50 percent, the Radius below 1.4, and the Threshold at 0. However, I have seen cool results when using an Amount of 10 percent, a Radius of 50, and a Threshold of 1 or 2.
You just have to experiment. The goal is to give your image a more crisp feeling to it, without going overboard.
Be Careful Out There
There are a few things you need to be aware of when you use the Unsharp Mask, including:
Have fun sharpening your photos!