Toshiba Satellite M50 (PSM53) - Manual (Page 164)

TOSHIBA M50 B-2
Display Modes
Displaying movies on a TV or CRT
This section describes how to set up your system to display movies
simultaneously on your computer's LCD and on an external TV or CRT
monitor.
Follow the steps below.
For ATI Chipset
1. Open the Control Panel and click Appearance and Themes.
2. Click Display.
3. Select the Settings tab and click Advanced.
4. Click the Displays tab.
5. Select the external display device you wish to use. It must be connected
to the computer in order to be selected from the menu here.