I have a question if I set it 4: 3 fortnite and then go out of the game but the game is running in the background is the picture just like in fortni?

I have a question if I set it 4: 3 fortnite and then go out of the game but the game is running in the background is the picture just like in fortni?

What the hell

Yes that picture is then in 4: 3 even if you close Fortnite is that picture in 4: 3 so your desktop.

Yes, your entire desktop is then synonymous in the desired resolution!