An image consists of a background upon which are placed various other objects. Next a green hill is placed on the image followed by trees and then a house and barn. Finally, a few cows are added. Each of these placement events comprise a layer. As can be seen, an image can consist of numerous layers.
Layers allow specific areas of an image to be edited without affecting any other data.
Objects in one layer can be repositioned, edited, drawn, pasted, and removed without disturbing objects on other layers. In our example, for instance, we could change the clouds from cotton puff to thunder storm types without affecting any other aspect of the image. Many people either don't know how to use search engines or have grown weary of using them. To show how important it is, Gateway2000 can be used as a perfect example. Over time, Gateway2000 and the WWW exploded with popularity.