To add a new empty layer
In the Explorer panel, open the Layers view (Hotkey: L).
Do one of the following:
.To create a new layer from a selection
Your selection is automatically added to the new layer.
To rename a layer
All layers except the Default layer can be renamed. All layer names must be unique.
To delete a layer
The layer is removed from the Layers view, and the objects in the deleted layer are added to the Default layer.
To set the current layer
New level objects are automatically added to the current layer.