In your map, you can create a drawing layer in Display Manager that includes all the objects from selected AutoCAD layers in the current drawing.
To bring in drawing objects from AutoCAD layers in the current drawing
AutoCAD Map 3D toolset creates a layer in Display Manager for each AutoCAD layer you select.
If you combine the layers in a group, you can turn the display of the group on or off.
The new layer appears in Display Manager. All objects on the selected AutoCAD layer are included in this layer. If you selected multiple AutoCAD layers, multiple layers are created in your map. To see the objects, you may need to zoom to the drawing extents.