Stories. For complex projects it is sometimes easier to break them up into manageable chunks. In this example we will use Stories to control the elevation heights, design layers for modeling and classes to control visibility and graphic style of object.
If you are not familiar with layers and classes, please refer to the Vectorworks Essential Manual, which has a series of exercises to explain these.
A story (storey) is a collection of design layers (foundation, slab, walls, and ceiling). The story settings control, amongst other things, the elevation of the story relative to other stories.