how view complex assembly system in drawing like this?
You can use exploded view. In assembly file,chose the "Exploded View" and explode the parts in axis directions which you want to see.(Save it is another file than the first) That link can be helpful:
In the drawing file, you should call the exploded view. Probably isometric view would be the best. If you do not see the assembly exploded sign the thick of show as exploded and if still not exploded change the view (for example from exploded view1 to exploded view2)
I hope it will be useful.