Setting up an LG OLED TV as a PC monitor

I recently switched my PC monitor from an 32" UHD Ultrawide Curved Monitor to an LG B4 48" 4K 120Hz VRR OLED TV . The way I see it, it's like have 2 ultrawides stacked vertically. However, since it's a TV, it's not ready to be used as a PC monitor out of the box. There's a lot of settings to go through. So I've gone through all of them, both for the TV and Windows, and written it all down here…