Currently the game only has Borderless Fullscreen and Windowed mode. If you’d like Exclusive Fullscreen you can follow these steps.
 
 

Navigate to the config

 
 
Head over to the GameUserSettings.ini config located in:
 
 
C:\Users\YourUsername\AppData\Local\Back4Blood\Steam\Saved\Config\WindowsNoEditor
 
 
Alternatively you can type %localappdata% as a run cmd or path destination.
 
 
Open GameUserSettings.ini with a text editor and change these lines to = 0:
 
 
FullscreenMode=1
 
LastConfirmedFullscreenMode=1
 
PreferredFullscreenMode=1
 
 

 
 
Save it and you’re all done!
 
 
You can also change this line StaticResolutionScale=71.00 to scale the in-game resolution to whatever you want.
 
 

Guide

 
 

 
 
This is all about Back 4 Blood – How to Fix Fullscreen Issue – Config; I hope you enjoy reading the Guide! If you feel like we should add more information or we forget/mistake, please let us know via commenting below, and thanks! See you soon!