I have a question about managing multiple models into one finale group of Architectural drawings. I have two buildings on 2 1/2 areas. I have existing and future upgrades in different scenes. At this point I have three separate model files. I cut and pasted two building models Into a separate larger (in the sense of scale) site model with all the prop lines, roads, etc. Should I have just modeled everything in the overall site model to begin with? This way I can mange layers. Or is there a way for you to change viewports to different files/models for each separate building within one layout file?