Search for these specific lines in your Notepad file and change their values as shown below to match professional optimizations used by players like :
: Keep this at 100% to maintain native clarity unless you are on a very low-end PC, where you can drop it to 75%. Critical In-Game & System Optimizations How to Get The Best Config File for Fortnite - ...
While the config file handles many "hidden" settings, ensure your in-game menu matches these high-performance standards: Search for these specific lines in your Notepad
What do I do if Fortnite doesn't save my settings? - Epic Games How to Get The Best Config File for Fortnite - ...
: Disables grass in Performance Mode to reduce rendering load.