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Chapter 11: Using Layers
hen you create, import, or scan an
Adobe Photoshop image, it consists of
a background layer, analogous to the
base layer of a painting. You can add more layers to
the image, allowing you to organize your work
into distinct levels.
You can draw, edit, paste, and reposition elements
on one layer without disturbing the others. Until
you combine, or merge, the layers, each one
remains independent of the other layers in the
image. This means you can experiment freely with
various graphics, type, opacities, and blending
modes. In addition, special features such as layer
masks, adjustment layers, and layer effects let you
experiment with and apply sophisticated effects to
the layers in your image.
Note: Images created using the Transparent option
in the New dialog box are created without a
background. Images with no background, as well as
images with layers, can be saved only in the
Photoshop format.
Using the Layers palette
The Layers palette lists all layers in an image,
starting with the topmost layer. A thumbnail of
layer contents appears to the left of the layer name.
It is updated as you edit. Use the scroll bars or
resize the palette to see additional layers.
W
UNDERSTANDING LAYERS Think of layers as sheets
of acetate stacked one on top of the other. Where
there is no image on a layer, you can see through to
the layers below. Behind all of the layers is the
background. In the illustration below, each animal
and the map are on separate layers. The dark texture
is the background. All layers in a file share the same
resolution, the same number of channels, and the
same image mode (RGB, CMYK, or Grayscale).
Zebra is on topmost layer.
Transparent areas on a layer let you see through to the
layers below.