UE4 - How to fix horizontal FOV scaling (add 21:9 display support)

If your viewport changing FOV verticaly, instead of horizontaly, when you change screen ration, then it won’t after you watch this video. This will help you to implement 21:9 screen ration (and others) correctly. Lines to insert in config: [/Script/] AspectRatioAxisConstraint=AspectRatio_MaintainYFOV