Use KRandRTray (KDE) or gnome-display-properties (GNOME) to rotate or resize your display manually on the fly. Both KRandRTray and gnome-display-properties are applets for the RANDR extension of the X server.
Start KRandRTray or gnome-display-properties from the main menu, or enter krandrtray or gnome-display-properties to start the applet from a shell. After you have started the applet, the applet icon is usually added to your system tray. If the gnome-display-properties icon does not automatically appear in the system tray, make sure is activated in the dialog.
To rotate your display with KRandRTray, right-click the icon and select . Select the desired orientation from the configuration dialog.
To rotate your display with gnome-display-properties, right-click the icon and select the desired orientation. Your display is immediately tilted to the new direction. The orientation of the graphics tablet changes also, so it can still interpret the movement of the pen correctly.
If you have problems changing the orientation of your desktop, refer to Section 33.7, “Troubleshooting” for more information.
For more information about the desktop-specific applets for the RANDR extension refer to Section “Monitor Settings” (Chapter 3, Customizing Your Settings, ↑KDE User Guide) and Section “Configuring Screens” (Chapter 3, Customizing Your Settings, ↑GNOME User Guide).