the best way to see this in Data manager is to switch the view in Project Setup to "object type" instead of "area'
go to project setup - comand _PROJECTSETUP
got to Plant 3D DWG Setting>Data Manager Setup
on the top of the page pick the "Object Type" bullit then OK to close project setup
in data manager now you can see the object class names including supports. This will show all the data assosiated to supports (this also can be adjusted in project setup).
note not all the dimensional data will appear in datamanager
Michael Gulnac
Technical Specialist
Organization
Autodesk, Inc.