Can I set at fortnite (PC) that I choose when building with my thumb buttons both the building part and place immediately?

My friend can place the things by pressing his thumb buttons on the mouse immediately. I must first press the thumb button and then confirm with the left mouse button. How can you change that? He himself can't explain it to me and we have also adjusted all the Einstzellungen and the error not found.

You have to make a macro then I'll do it too

How is that possible?