Clarity
The Clarity filter adds subtle definition to an image's details. Use the Clarity filter to enhance the contrast of image midtones, without overpowering the shadows and highlights.
Customized settings can be saved as a preset for future use. Presets can be selected from the Presets drop-down, or saved by clicking the adjacent Save icon.
To adjust image clarity:
- Select Filter | Detail | Clarity from the main menu, or press Alt + C.
- Drag the Strength slider to the right for greater clarity, or to the left for reverse clarity.
- Do one of the following:
- Click OK to apply any changes and close the tool.
- Click Cancel to discard all changes and close the tool.
Enter a numerical value into the number box to incrementally make precise adjustments.
Right-click a slider to reset to the default value.
This filter features a Pixel Targeting tab (see Pixel Targeting for more details). 
Use the Edit Brush to paint this effect onto specific areas of the image. 
Use the Gradient tool to transition this effect across specific areas of the image. 
Use the Radial Gradient tool to apply effects around, or directly to, a center point. 