EverNightX: Well 1st it's not single player only. It has multiplayer too. Same as Divinity Original Sin 2.
And 2nd
what in the world are you talking about? He's just looking for the display option to run in a borderless window vs exclusive fullscreen mode. That has nothing to do with how many players the game is for. It's just a window mode in desktop environments & can be pretty useful for example if you have multiple monitors.
I read the OP again:
"just a suggesting for game video setting, it would be very good if
yal..."
Is he talking to the BG3 game developers on the GOG general USER forum? Should I be a mind reader? Assume that someone just throws some thoughts on some internet space without much thought?
Maybe youse should read what's there and not what you think that it might mean. I replied to someone talking to US, me included.