ReBAR Aorus x470 Gaming 7 Rev 1.1 and High Resolution On BIOS

Hey guys, how are you? I would like to know if someone can help me with the modification of my Aorus X470 Gaming 7 mii mother BIOS. I have a Ryzen 2700x CPU and I would like to be able to activate the ReBAR option, I saw in a discussion that a user was able to achieve it. In addition to that, I would like to know if anyone knows how to change the BIOS resolution to my monitor’s (1920x1080) since the resolution within it is lower. From already thank you very much!