Layers can overlap each other. In HTML code, the stacking order, or z-index, of the
layers determines the order in which they are drawn in a browser. You can use the Layers
panel to change the z-index for a layer and set which layer appears in front of or behind
another layer.
The Layers panel lists layers in the stacking order in which they appear on a page. The
layer at the top of the Layers panel list is the layer at the top of the stacking order; it
appears in front of the other layers.
To change the stacking order of layers in the Layers panel:
1 In Dreamweaver, select Window > Layers to open the Layers panel, if it is not already
open.
2 In the Layers panel, do one of the following:
Drag a layer up or down the list to the desired stacking order. A line appears as you
move the layer, indicating where the layer will be placed.
In the Z column, click the number of the layer you are changing. Type a higher
number than the existing number to move the layer up in the stacking order, or type a
lower number to move the layer down in the stacking order.