Blending Layers Together
To blend two (or more) layers together, you should use the Opacity slider on the upper layer. This makes the top layer semi-transparent so that the layer underneath becomes visible. You can create some interesting effects with this technique. Here’s how:In the Layers palette, make sure that the two layers that you want to blend to are directly next to one another, as shown in Figure 19-4.

Figure 19-4: Use the Layer’s palette to place the layers next to one another.
Select the uppermost of the two layers.
Click the arrow button next to the Opacity text box and use the slider that appears to adjust the layer’s opacity, as shown in Figure 19-5.

Figure 19-5: Use the slider to set the layer’s opacity.
Tip | If you’re using the Move tool, you can quickly change the active layer’s opacity by typing the percentage on the keyboard. |
Tip | You can’t change the opacity of the Background layer or a layer that’s locked. If you want to change the opacity of the Background, you have to convert it to a regular layer first. To do this, choose Layer>New>Layer from Background. |