I was trying to change the resolution to 1280x720 i think and when i pressed apply my screen went black and it says mode not supported… Basically i dont have visual access to my computer anymore 
however before i boot in to Linux i see some kind of boot menu from which i can access GRUB Command Line, Advanced options for Monjaro Linux(i tried all of these, didnt help) or i can just boot in to Linux. Is it possible to change the resolution back to the original one from that GRUB Command Line? Screen goes black after i enter my password and log in(basically when i reach the desktop).
Thank you for reading.