How do I use the media keys? Nathan C. May 10, 2018 21:40 Follow Please press FN Key and Function Keys F1 to F12 to activate it (Fig. 01). Fig. 01 / MK Retro Function Keys. Have more questions? Submit a request Comments Article is closed for comments. Articles in this section How do I use the media keys? How do I change the hotkey defaults? How do I disable the [Windows Start] key? How do I adjust the height of the keyboard? Why does the backlight remain on after shutdown?