When rotating your Tablet PC monitor, the orientation of your display and of your graphics tablet is not automatically adjusted. For the KDE desktop, use KRandRTray to rotate or resize your display manually on the fly. KRandRTray is a KDE applet for the RANDR extension of the X server.
Start KRandRTray from the main menu or with krandrtray from a shell. This adds the KRandRTray icon to your system tray.
To rotate your display, click the icon and select the desired orientation from the context menu. 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 34.7, Troubleshooting for more information.