Now go to Image – > Mode – > Lab color
Click on the Channels tab in Layers menu, Click on Lightness. Choose Burn tool with options: shadows and exposure something between 15-20%
Now you need to make shadows darker but not too much. Paint there where you see shadows.
Now choose Dodge tool. Set here Highlights and exposure something about 15%.
Now do the same as with Burn tool but now focus on highlights. Bring on light areas more light.Turn on normal mode. Now you can see the change:








