Serif ECD518624M Datasheet download pdf (Page 143)

Layers and Masks 135

Basics of using layers

If you're accustomed to thinking of pictures as flat illustrations in books, or as

photographic prints, the concept of image layers may take some getting used to.

In fact, layers are hardly unique to electronic images. The emulsion of

photographic film has separate layers, each sensitive to a different color—and

we've all noticed multiple-image depth effects like shop window reflections or

mirrored interiors. There is still something magical about being able to build up

an image in a series of planes, like sheets of electronic glass, each of which can

vary in transparency and interact with the layers below to produce exciting new

images and colors.

Kinds of layers

In a typical PhotoPlus image—for example, a photograph you've scanned in, a

new picture file you've just created, or a standard bitmap file you've opened—

there is one layer that behaves like a conventional "flat" image. This is called the

Background layer, and you can think of it as having paint overlaid on an

opaque, solid color surface.

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Serif ECD518624M Datasheet Page 143