In Vectorworks 2015 there is a change to the 3D viewing options.
The clip cube is a fantastic technique for filtering your model in 3D. The clip cube will allow you to filter out the parts of your model that you do not want to see. The easiest way to create your clip cube is to select an object before activating it. You can see from the image how it takes away all the information that you don’t require. The clip cube can be adjusted after you activate it using the selection tool.
Stack Layers View – To see the roof and the walls together, use the Stack Layers view.
Snap Loupe – Using the Snap Loupe makes it easy to zoom in temporarily.