Fortnite automatically assign items to the slots?

I have recently seen a video of (I think) Tfue. If you do not know Tfue, it's one of the best fortnite players in the world. There I saw him picking up a medikit or something like that, and it was right on his last slot… Can you stop that?

Clear Settings → Gear → Arrange utensils to the right AN

Yes that you can adjust in the settings, but no longer knows exactly where