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3.8 Key Lock setup
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For the “KEY LOCK ON/OFF” setting, press the “MENU” (**S) button to
enter key lock setup mode. Users can use “Up”, “Down”, “Increase” or
“Decrease” button to set the Key Lock ON or OFF. When the Key Lock is
set to ON, all other keys except the “MENU” button will be locked. Users
need to press the “MENU” (**S) button to enter MENU mode and un-lock
the Key Lock function by setting the Key Lock to OFF.
Press ESC (*L) button will return to the previous display window.