Hello,
Sorry but I’m not sure that understand your question. Do you want to show the menu in one line for that resolution? In this case you need to use custom code and reduce the font-size for example
@media only screen and (max-width: 1155px){
.header-main-menu2.et_element-top-level .menu > li > a, .header-main-menu.et_element-top-level .menu > li > a {
font-size: 14px;
}
}
Regards