Toshiba Satellite A20 User Guide - Page 188
Enabling different video refresh rates, Adjusting the quality of the external display, Start
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188 Exploring Your Options Changing the display properties setting 2 Release the Fn key. TECHNICAL NOTE: You can also change these settings using the Display Properties box in the Control Panel. In order to use a simultaneous mode, you must set the resolution of the internal display panel to match the resolution of the external display device. Enabling different video refresh rates Your computer has a Trident video chip. To use the built-in display panel and external video device simultaneously, you must first enable the different refresh rate option. 1 Click Start, Control Panel. The Control Panel appears. 2 Click Appearance and Themes. 3 Click Display. 4 Select the Settings tab. 5 Click Advanced. 6 Select the Display Device tab. 7 Click the Enable Different Refresh Rate button. 8 Click Apply. Adjusting the quality of the external display To obtain the best picture quality from your external display device, you may need to adjust the video settings. See the