# OL3-ext: LayerSwitcher control

Add a simple popup layer switcher to the map. Only first level is enable in the popup.

- The title or name layer's property is used to named the ol.layer in the switcher.
- It shows use of the displayInLayerSwitcher layer's property to cause it to not display in the LayerSwitcher
- The baseLayer layer's property manage exclusive visibility on layers (only one base layer is shown at a time).