To Deactivate a Layer
A layer remains active for the life of the session or until you deactivate it. You can deactivate layers in the following ways:
Delete the setting for the def_layer configuration option.
Rename the active layer. The layer is automatically deactivated.
Deactivate the Layer Manually
You can also deactivate the layer by doing the following:
1. In the Model Tree navigator window click and then click Layer Tree. The Layer Tree opens. All existing layers are listed.
2. Right-click the layer you want to deactivate, and click Deactivate. The layer is deactivated. Any items created or shown after this point will not be automatically placed on the layer.
If the settings for the def_layer configuration option are changed for the layer that was activated manually, you cannot deactivate such layers.