Layering
When dealing with computer graphics or images,
layering is a capability of a program that allows various images, graphics or text to be laid on one another.
Layering allows the person to make changes to an image without changing the
original image and can allow that person to view what an image would look like
with or without layers. Once an image containing layers is completed it can be
flattened and saved combining all the layers into one image.
In the image to the right, is an example of what the Layers box looks like in Adobe Photoshop. As can be seen there are four visible layers. Each of these layers could be moved above or below other layers or hidden to effect the overall look of the final image.
Also see: Graphics