Technique 17.)

Figure 20-9: Color overlays can change a layer’s color radically.
Here’s how to apply a color overlay:
Select a layer in the Layers palette.
Click the Add Layer Style button at the bottom of the Layers palette, and then choose Color Overlay from the menu.The Layer Style dialog box opens with the Color Overlay effect selected. (See Figure 20-10.)

Figure 20-10: The Color Overlay settings are pretty straightforward.
Click the color square to the right of the Blend Mode drop-down list to select a color with the Color Picker.
Use the Blend Mode drop-down list to select a blending mode.Experiment with the blending modes to see what kind of interesting effects you can create.
Use the Opacity slider to set whether the color overlay is solid (100%) or semi-transparent.
Click OK to close the Layer Style dialog box.