NoDispCPL - Disables the Display option in Control Panel such that iff you try to run the Display Control Panel applet you will receive the message: Your system administrator disabled the Display control panel.
NoDispAppearancePage - Removes the Appearance tab which means users cannot change the colors or color scheme.
NoDispBackgroundPage - Removes the Background tab means the user cannot change the background.
NoDispScrSavPage - The Screen Saver tab does not appear in the Display Properties page of Control Panel.
NoDispSettingsPage - The Settings and Plus tab do not appear in the Display Properties page of Control Panel.
These changes take immediate effect and any disabled tab will not be displayed. It is better to implement these changes with the policy editor since the user can not override it.