The Layers panel lists all layers (a layer is a set of <div> tags that is set to either relative or absolute position) in the current web page. You can use the panel to add or delete layers from a web page, and to modify each layer's ID name, stacking order (z-index value), or visibility.

In Design view, use Draw Layer | |
Click Insert Layer | |
Click the plus sign | |
The ID of a layer that is nested within another layer appears indented under the parent layer. | |
Selected layers appear highlighted in the panel. | |
Icons appear in the Layer Visibility column next to layers that contain a visibility property, either visible | |
The Layer Z-Index column shows the value of a layer's z-index property, which defines the order of the layer along the z-axis. Layers are automatically listed in ascending order. | |
The Layer ID column display the value of each layer's ID attribute. Each layer must have a unique ID to distinguish it from other layers and other content that is using this attribute. |