Psion Teklogix 7530 G2 사용자 설명서

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Chapter 5: Configuration
Display Properties
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Psion Teklogix 7530 G2 Hand-Held Computer User Manual
In  the  Display Properties dialog box, tap on the Contrast tab.
Slide the bar in the Contrast tab to the left to decrease or darken the 
display contrast. 
Slide the bar to the right to increase or lighten the display contrast.
5.6.1.2
Display Backlight
The Display Properties dialog box in the Control Panel allows you to specify the 
intensity of the backlight along with how long the backlight remains on when the 
7530 G2 is not active.
Note: Keep in mind that this option may be restricted to supervisory use only.
In  the  Display Properties dialog box, tap on the Backlight tab.
Note: Backlight changes take effect immediately. You do not need to reset 
the unit.