I’m trying to setup my wow to be in 4:3 fullscreen ( with black bars ) and it doesnt seem to work at all anymore, i’ve tried switching from dx12 to dx11 and when i hit fullscreen it just resets to 1920x1080.
‘‘Why would you wanna play in 4:3’’ Because nostalgia and I like how it looks 
is there a way to make it work? graphics card settings or something?
thanks!
Try settings “default” window size in wow settings. It should adjust to display resolution.
If you are using NVIDIA graphics card, just open NVIDIA Control Panel and you will find Display tab, click on Adjust desktop size and position , head over to Scaling and make sure it is on Aspect ratio, after that is done you wanna create custom resolution by going to Change resolution, I prefer 1280x960 since it is an original 4:3 resolution, if you can’t create it then it means you already have that resolution saved but you didn’t apply it, you can apply it by going back on Adjust desktop size and position, click on Resolution and change it to 1280x960, hit apply and you are good to go.