Unitech PT600 - Manual (Page 12)

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1.3 Using the Keyboard
The keypad of PT600 consists of 27 rubber keys, the key is used to
switch on/off the unit and other 26 keys are used to control the unit and
key in data. The use of keyboard is categorized to three modes: normal
mode, command mode, and alpha(betic) mode. All keys except key
may produce a sound (tone) when pressed. Keys of upper four rows have
larger size for easier key-pressing to input numbers.
[ ] When the unit is off, pressing the key will turn on the unit.
On the other hand, when the unit is on it is needed to press
and hold down the key for about one second in order to turn
the unit off.
[CMD] Pressing the [CMD] key sets the keyboard to Command
mode. However pressing and holding down the [CMD] key
for two seconds in Ready mode will enter the User mode. In
User mode, users can invoke system commands by menu
selection.
[ESC] In User mode or Supervisor mode, pressing the [CMD] key
and then pressing [ALPHA] key will exit from the current
operation to the previous operation.
NORMAL
mode
COMMAND
mode
ALPHA
mode
press [CMD]
press [CMD]
press [ALPHA]
press [ALPHA]
press [CMD]
press [ALPHA]