http://i.imgur.com/tJAfXJl.jpg
i hit fn and f12 just to see what it did and now i can't type.
its a foreign keyboard "plum" is the company and it says that m symbol means its programmable...
i have no idea how to turn this off
this is the keyboard https://mechanicalkeyboards.com/shop/index.php?l=product_detail&p=1898
the user manual was in chinese or japanese