The Lighten tool is used to lighten a specific area of an image. You could, for example, lighten a dark area of an otherwise well-exposed image to add extra emphasis to it.
In the Tool Options pane, customize the Lighten tool.
Brush Size: Drag the Brush Size slider to adjust the size of the Lighten tool brush. Hold down thekey to extend the range of the Brush Size slider beyond 100%. You can also manually enter a value from 0% to 200%.
Tip: You can use theand keys on your keyboard to change the size of the Lighten tool brush.
Softness: Drag the Softness slider to adjust the softness of the edges of the Lighten tool brush. With softer edges, the lightened areas will usually blend in better with the rest of the image.
Strength: Drag the Strength slider to adjust the intensity of the lightening effect.
Select a tonal range to lighten:
Brush over the area of your image you’d like to lighten.
Show Original: Click the Show Original button or press+ on your keyboard to see what the image looked like before you lightened anything in it.
Show Split Comparison:-click the Show Original button or press + on your keyboard.
Click Reset to discard all the current changes made with the Lighten tool.