How to use design responsive page interface in bootstrap studio 5?

I downloaded bootstrap stidio 5 and can’t understand, how to design responsive pages. I looked throught documentation and founded this page:

But the interface in my studio 5 looks another way:

I try to find the list (sm, md, lg, xl, etc.) but there is nothing! What am I doing wrong? I don’t understand where I have to search for this list of displays!
Thank you very much.

What version of BSS are you using? You may have to update as there was a bug in 5.8.0 that was hiding things in rows and column options