Symbol mc9090g 用户指南

Getting Started 2 - 43

The keypad special functions are color coded on the keypads. For example, on the 53-key keypad, the display 
backlight icon is blue indicating that the blue function key must be selected first to access the display backlight. On 
the 43-key keypad, the display backlight icon is white indicating that the display backlight is the default value for 
that key.

Blue key 
+ #

Blue key 
+ 7

Blue key + V

 key

 

key

Blue key + 
Z

Turns on and off the 
display backlight.

Blue key 
+ 0

Blue key 
+ 4

Blue key + Y

 key

 

key

Blue key + 
X

Turns on and off the 
keypad backlight.

Blue key 
+ 1

Blue key 
+ 8

Blue key + A

Blue key + 
F1

Blue key + 
F1

Blue key + 
D

Monochrome units: 
Increases display 
contrast.

Color units: Increases 
display backlight 
intensity.

Blue key 
+ 4

Blue key 
+ 5

Blue key + E

Blue key + 
F5

Blue key + 
F5

Blue key + 
I

Monochrome units: 
Decreases display 
contrast.

Color units: Increases 
display backlight 
intensity.

Blue key 
+ 3

Blue key 
+ 9

Blue key + D

Blue key + 
F4

Blue key + 
F4

Blue key + 
H

Increases scan 
decode beeper 
volume.

Blue key 
+ 6

Blue key 
+ 6

Blue key + H

Blue key + 
F8

Blue key + 
F8

Blue key + 
M

Decreases scan 
decode beeper 
volume.

Blue key 
+ CTRL

Blue key 
+ CTRL

Blue key + X

Blue key + 
CTRL

Blue key + 
CTRL

Blue key + 
CTRL

Enables Alt keypad 
functions.

Not 
available

Not 
available

Blue key + U

Not 
available

Not 
available

Not 
available

Sends TAB character 
(forward tab).

Use of display and keypad backlighting can significantly reduce battery life. Mobile computers with color 
screens do not have contrast settings.