[how to get chaos head to display fullscreen;change resolution]

so i looked around more and apparently pressing "f" makes VN's go fullscreen or so i think..,it definitely works for chaos head though.i read steins gate features an option for fullscreen in the in-game menu,and not in the main menu(i was facing this problem with steins gate as well).just writing this to help anyone who may be facing the same problem .

[how to get chaos head to display fullscreen;change resolution]

i really didn't want to create a new thread on this topic,but i didn't know where else to ask this question too,so here i am.as the self-explanatory title says,how do i get chaos head to be fullscreen,currently it's running in windowed mode and i cannot see any option to change this in the config menu(i have tried flipping every button in those menus).Further,can the resolution it's running in be changed as well,and if so,how?thanks for listening,