Photoshop Layers

The question posed was "How can I use layers as an application?".

The answer is easy. As a florist by trade, I can use layers to place my floral creations anywhere I want them. I could take a fabulous, designer centerpiece and place it on a table in a magnificent ball room. I could show customers what my flower arrangements will look like in their homes, or I could place a bridal bouquet in the hands of a potential bride to see how it will look. The uses is limitless for what I can do with layers.