Hi!
OK, I solved my issue, but there must be an easier way, too …
I started to use custom.css. I added some lines there, now the responsive behaviour of the header is OK for me.
I added the following lines to my custom.css to show the module positions "toolbar-l" and "toolbar-r" on mobile:
@media (max-width:767px){
.t4-top-bar {display: block !important;}
}
In "header-r" I have 3 modules on mobile (Head Actions, Head Search and the Offcanvas menu) and I wanted to change the visibility only by two modules.
So I added new classes to the modules and extended the custom.css further for my needs …
Greetings: J