Can anyone explain why games have HDR calibration settings? They rarely seem to make much difference, and just make me confused as to whether i've got the correct setting. Therefore I don't know if i'm getting the optimal experience. 4K UHD Blu Ray's don't have calibration options (that i've seen), so when you're watching a movie on a UHD Premium screen, you know that within reason you're watching it as intended. I started playing Battlefield 1 yesterday and I spent ages fiddling with the brightness and HDR calibration screens and still have no idea if i've got it right. I find the same in all games with these settings and in the end just give up and use the default. I like HDR, and I like that there is a 'standard' for TV's which can display HDR as intended, so why confuse things with calibration settings?