2. Duplicate the layer using shortcut cmd/ctrl-J. This is the layer you will use to make adjustments.
3. From the Enhance Menu, select Adjust Lighting, then Shadows/Highlights.
4. Slide the Lighten Shadows adjustment to the left.
5. Slide the Darken Highlights adjustment to the right until the white area starts to turn tanned or darker.
6. Slide the Midtone Contrast adjustment slightly to the left.
NOTE: Because each image is different and the amount of tan lines varies you will need to practice moving the sliders until you get your desired results.
7. From the Enhance Menu, Select Adjust Color, then Adjust Color for Skin Tones.
8. Click in one of the lighter areas in which you are trying to adjust.
9. Adjust the Blush and Tan sliders until you get a pleasing tanned color.
10. In the Layers Palette click on the Layer Mask Icon.
NOTE: I’ve just learned that if you hold down the alt/opt key down on your keyboard, a black layer mask will be added instead of white.
12. With the Layer Mask selected, go to the Edit Menu and select Fill Layer and Choose Black.
13. Reset your default white and black foreground and background palette colors by tapping the D on your keyboard.
14. Set white as your foreground color. If black is your foreground color, tap the X on your keyboard and it will swap the foreground and background colors.
15. From the toolbox, select the brush tool.
16. Click on the brush icon in the option bar.
17. Slide the spacing adjustment to 1% and hardness adjustment to 0%.
18. In the options bar, set the opacity to 5%.
19. Using the bracket keys [ ] or, if you are in a country other that America, adjust the brush size from the option bar so that the brush is slightly smaller than the light area you are trying to darken.
20. In the Layers palette, verify that you still have the layer mask selected.
21. Start painting on the light areas of your image.
NOTE: Because the opacity is set low, you will need to paint multiple times in each area to darken the tan lines.
22. To darken the light areas even more, click cmd/ctrl-E until all your layers are merged.
23. Repeat steps 2 though 21.
For printer friendly instructions, go to scribd.