I created 7 model but I need to create a bigger one, containing the previous 7. I can only copy and paste the 7 models into the bigger one? Does it exist a way to compress a model into something smaller in order to keep from becoming blind? Because if I can only copy and paste, I need to zoom a lot and it becomes difficult to connect an element to another. And what is the composite model? How and when I can use it? Thanks