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Press the >>I or I<< button to select Contrast, Black or Exit. ~ If Contrast is selected, press MENU button to enter, press the >>l or l<< button to set the contrast level to 0-15 as desire then press and hold the MENU button to save the setting and exit. ~ If Black is selected, press MENU button to enter, press the >>I or I<< button to select the display auto turn off timer to 0 (Display will not turn off); 6;12;18;24 or 30 (seconds), then press and hold the MENU button to save the setting and