Fortnite, help with building?

I have the following problem.

I have bought an XBox for a long time and now I have the problem with Fortnite that if I open the construction menu and then want to build stairs, for example, I have to press 2 X LT? In the past it was very easy that every part had its place, I had to press once and zack.

Go to Settings and then set the keyboard shortcuts

Already got it.