When I import a .DWG file to a Plan Drawing, it would be helpful if I could "dim" the background or selected layers so I could emphasize the Audiovisual symbols I am placing on the drawing.  Additionally, it would be really helpful if i could sort layers by layer name. 
‌While we are at it; why not enable layer visibility in the Current Layer Properties box.  This would save untold time on drawings with a large quantity of layers.