Toshiba Satellite Pro R50-D Series User Manual page 98

To open the Screen Resolution dialog, click Start -> Windows System ->
Control Panel -> Appearance and Personalization -> Display ->
Change display settings -> Advanced display settings.
If you are running some applications (for example a 3D application or video
playback), you might see some disturbance, flickering, or frame dropping
on your screen.
If that occurs, adjust the resolution of display, lowering it until the screen is
displayed properly.
User's Manual 4-43