Casio DT-300M60E - Manual (Page 15)

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Keys and Their Functions
The Handheld Terminal has 18 stroke keys and one read key.
Stroke Keys and Their Functions.
1 Read key
Press this key to read a bar code.
2 Clear key
Press this key to cancel input.
3 Backspace key
Press this key to erase the character to the left of
the cursor. This key can be set to do other
functions, except for reading bar codes.
4 10-key pad
Press these keys to enter numbers 0 to 9 in the
number input mode.
5 Power key
Press this key to turn the power on and off.
6 Enter key
Press this key to register input.
7 Brightness control keys
These keys can be set to do other functions,
except for reading bar codes.
The default setting is:
▲ : Increase the LCD screen’s contrast
▼: Decrease the LCD screen’s contrast
8 Backlight key
Press this key to turn the backlight on or off. This
key can be set to do other functions, except for
reading bar codes.
9 Function key
This key can be set to do other functions, except
for reading bar codes. The default setting is the
space key.