Change button assignment on PC in Fortnite Controller?

Ha
3

I'm playing Fortnite on my PC. I just downloaded it. I actually play on PS4 and therefore use a controller. I would now like to know how to change the key assignment. I tried it but somehow it doesn't work.
LG

Change key assignment on PC in Fortnite Controller
Ge

Must be adjusted

Pa

You have to press customized

Ha

Ah k thanks