To set this up, you’ll need to modify your file. How to Change Your Resolution Press Windows Key + R , type %localappdata% , and hit Enter . Navigate to FortniteGame > Saved > Config > WindowsClient .
Set your GPU scaling to "Full Screen" to ensure the image stretches to fill your monitor.
You must also create a Custom Resolution in your GPU control panel (NVIDIA Control Panel or AMD Radeon Software) that matches what you put in the config file, or you'll see black bars.
