How do I set the Target Platform shown in the project output?

Hello. I'm writing documentation for a .Net project. The output contains a list of target platforms (auto generated by Document! X), that is: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family My project is a .Net 4.0 assembly which definitly does not target Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000. Where does Document! X get the information about the target platforms? Who can I restrict the list of target platforms? Haven't found anything about it in the online help. TIA