Mark MSU 15 - Keyboard Lock

3.22 Keyboard lock
Keep both Up and Down buttons pressed for more than 3 seconds to lock or unlock the
keyboard.
• The display will show the label <Loc> blinking for 3 seconds if the keyboard has been
locked.
• The display will show the label <UnLo> blinking for 3 seconds if the keyboard has been
unlocked.
Example Lock/unlock screen.
Instruction book
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