Autodesk Architectural Desktop provides additional layer tools which add layer standards, layer keying, and a layer management interface, the Layer Manager, to help you standardize, automate, and manage the use of layers in your office, in your projects, and in your drawings.

Each layer key style contains a set of layer keys. You can create different sets of layer keys that you can use to place objects on defined layers in your drawings. The NIH-AIA (256 color) layer key styles contain layer keys and layer properties, including layer name, description, color, linetype, lineweight, plot style, and plot settings for all of the AEC objects. You can copy an existing layer key style and purge unused layer key styles. You can purge only those layer key styles not currently in use. Layer key styles can be imported to and exported from existing drawings and new drawings. You can import the NIH-AIA (256 color) layer key styles from file NIH_KeyLayer.dwg that is available for download at NIH_KeyLayer.dwg. For more information about Layer Key Styles refer to Architectural Desktop Help file.