Toolbox Settings - Predefined Layers Use the Layer screen of the Toolbox - Settings dialog box to map and manage predefined layers to basic entity types or to Toolbox parts, symbols, and tables. The layer definitions are applied when you create the entities or insert the items. Contents Managing Predefined Layers Turning Predefined Layers On and Off Managing Predefined Layers and Layer Properties Exporting and Importing Settings for Predefined Layers