Photoshop Tutorials : Lesson # 13: Adjusting a selection or layer’s opacitys

1. In the Layers palette, select the layer whih you wish to make opaque.
2. Slide the Opacity slider to a new position to chage that layer’s opacity.
3. Drag the image by its title bar to one side of the screen;. Choose New View Les

The example below showsthree duplicated selections, each pasted onto a new layer.
Each layer has a different opacity.

Duplicating a selection
1. Each time you press option-command-mouse and drag the mouse, the selection
is duplicated.
Duplicating selections is useful if you want to repeat an selection several times within
one document on  separate layers.