Sharpen image areas

The Sharpen tool increases contrast along edges to increase apparent sharpness. The more you paint over an area with the tool, the sharpen effect increases.

Select the Sharpen tool .
Do the following in the options bar:
- Choose a brush tip and set options for the blending mode and strength in the options bar.
- Select Sample All Layers in the options bar to sharpen using data from all visible layers. If this is deselected, the tool uses data from only the active layer.
Drag over the part of the image you want to sharpen.