13 Layer on layer
Double-click a layer in Photoshop and it brings up the Layer Style dialog. You’ll notice three sub-menus, offering interesting options. Experiment with the lot, but here I’m going to limit my lesson to the Blend it option. Notice those sliders have a line running through them. Put your cursor over one and hold down Alt, then move the slider. Note how the slider is now in two pieces? This permits you to fine-tune how your selected layer blends with the layer beneath.