I think if you want to place drawings of different floors under each other on a layout, you don't actually need the Trace feature, you can just place a single drawing of each floor under each other on a layout. Make sure to turn the background of the drawing to transparent, and if you want the "reference" to look different, just override its pen set from the drawing settings, or save the view with an override.
Does this help in what you would want to achieve?
Daniel Alexander Kovacs
Technical Support Engineer GRAPHISOFT