Using Backlight; Turning The Key Tone On And Off; Changing The Display Contrast - Radio Shack PRO-99 Owner's Manual

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USING BACKLIGHT

You can turn on the display's backlight for easy viewing in the dark. Press LIGHT to turn on the light for 5
seconds. If necessary, you can change the lighting time. See "Changing the Backlight Duration" below. To
turn off the light sooner, press LIGHT again.
Press FUNC then press LIGHT to turn on the display's backlight for an extended period of time. To turn it off,
press FUNC then press LIGHT again.
Changing the Backlight Duration
1. Press and hold FUNC for about 2 seconds. Function Menu appears.
2. Press 6 then press 1 to select 1:Back Light.
3. .Press ^ or v to select the desired backlight duration. Selecting 3, 5, 10 or 20 sets the backlight duration.

TURNING THE KEY TONE ON AND OFF

The scanner is preset to sound a tone each time you press one of its keys (except LIGHT). You can turn the
key tone off or back on.
1. Press and hold FUNC for about 2 seconds. Function Menu appears.
2. Press 6 then press 2 to select 2:Key Tone.
3. Press 1 to select key tone on, or press 2 to select key tone off.

CHANGING THE DISPLAY CONTRAST

1. Press and hold FUNC about 2 seconds. Function Menu appears.
2. Press 6 then press 3 to select 3:LCD Contrast.
3. Press < or > to select LCD contrast. Then Press ENT to set the display contrast.
KEY LOCK