With Solaris CDE you can choose to log in to either the OpenWindows desktop or the CDE desktop (as well as a failsafe session or your last desktop) from your login screen. For more information on logging in, refer to the Login Manager help volume or "Chapter 2, Starting a Desktop Session" in Solaris Common Desktop Environment: User's Guide.
Choose Session from the Options menu on the login screen.
You see the following choices: Common Desktop Environment, OpenWindows Desktop, OpenWindows 2 Desktop, User's Last Desktop, Failsafe Session.
Select either OpenWindows Desktop or CDE.
Once you have made your selection, you see either the OpenWindows or the CDE logo.
Continue your login.