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Creating and Modifying layers in DreamweaverMX Adobe Dreamweaver / Layers
Layers are DHTML components and are similar to tables with a few different properties. In tables you can put text or images. But layers allow you to position an image or text in a particular point on the page and it will automatically derive the x and y coordinates for the layer. You can reposition the layer by selecting and dragging. You can made Layers hide or visible, this is an additional advantage in layers. In different browsers, Layers are viewed differently.