Default unknown key functions

i have an lg g3 f400l korean model
while trying to go into recovery i pressed both the volume up and down then the power
i got into a screen to my problem in korean
what i did notice that there were 3 options
can anyone tell me to which screen i entered and what are the options?
i did go into recovery by pressing the volume down and power, does anyone know EXACTLY at what point the keys must be released and at what point EXACTLY they must be pressed.
it seems like a trial and error until you get into the recovery, it took quite a while can anyone be more specific
thanks
please no jokes or snotty remarks or guys telling me they have a d85CADILLAC and they get into recovery just by staring at the phone or doing a spok memory touch