Beaver Builder custom header "add new layout" layout type is not active

Hello I would like to change my top bar menu and I guess the easiest way is to create a menu from beaver builder. Although when I go to beaver builder and click “add new” I only see the “title” and “type” option unfortunately not the “layout” which I want to have as header.
Can you please help me to find that out?

Thank you

You need to select Themer Layout first