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How to optimize keyboard to the operating system?
If you use OSX (Mac OS), you should click fn + O for 3 secs to have the perfect environment.
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Just click device button on top of function keys for 3 secs.
How to reset keyboard?
Turn off → Turn on → ESC+O, ESC+O, ESC+B → You should see two blinking LEDs on F11 and F12 → Turn off → Turn on
Note you should release and press between ESC+O and ESC+O - meaning ESC + O, O does not work.