Level Dimension Tool/Object for 3D documents?

[PB]

Is there any way of picking up and 'dimensioning' levels directly in the 3D document window?

The 3d document is an ideal method of communicating a complicated series of 'cascading' wall levels on intersecting walls......but I can find no way of doing so !......Am I missing the obvious (the standard level dimension tool does not work in the 3D document window)?

Please help.....

[Anonymous]

This all works in 3D Doc BUT I'm finding it doesn't work in "3D Document from Floor Plan"
Anyone else having that issue? Level dimensions in that space pull from the origin point rather than a 3 Dimensional height and the Level Dimension tool doesn't have the option to elevate to a slab. Seems like a oversight on GS's part but maybe I'm missing something.

See this example 3DD reflected ceiling plan, trying to get level dimensions on the ceiling plans that are tied to the slab surface.