The Layer Translator
Change AutoCAD drawing layers from one standard to another using the Layer Translator. This former Express Tool has been added to the standard AutoCAD toolset.
Pull down menu: Tools > CAD Standards > Layer Translator...
The Layer Translator dialog lists the Layers of the current drawing in the Left pane. The right pane lists the target Layers. You populate the right pane by loading Layers from an existing drawing, template, or drawing standards file. You can also add new Layers on the fly using the "New..." button.
In the left pane select a Layer to translate, in the right pane select a Layer to translate to, and click the "Map" button; a Layer Translation Mapping list is created in the lower pane. Multiple Layers can be mapped to the same target Layer. This mapping is then applied with the "Translate" button, and/or saved to a drawing standards file (DWS) with the "Save" button. Layer Mappings loaded from a DWS automatically populate the Layer Translation Mappings pane.
Translated Layers take on the properties of the destination Layer. Mapped Layers are removed from the current drawing. The "Map same" button can be used to map all current Layers to Layers of the same name, effectively changing their properties to match the target Layer properties.
The "Settings..." button gives you even more control over Layer translation.
The default settings allow you to change the properties of objects on a Layer to Color ByLayer and Linetype ByLayer during translation. Objects nested within blocks are also translated.
You can cause the Layer Translator to display the contents of each Layer as you're remapping (similar to the old Layer Walk Express Tool).