ATI Technologies Radeon X600 - Manual (Page 14)

8 ATI Displays Tab
To access the Display Properties dialog, right-click on the desktop or
navigate through Windows® Control Panel , which is located in the Start
menu.
ATI Displays Tab
The ATI Displays tab provides control over multiple-monitor features.
Here you can enable/disable display devices and swap the assignment of
Primary and Secondary displays.
Windows® Display Properties Settings Tab