Thanks, finally solved it as following using the custom css section
/*
You can add your own CSS here.
Click the help icon above to learn more.
*/
.page-header {
display: none;
}
#primary {
padding-bottom: 40px;
padding-top: 0px;
}
#masthead.site-header {
z-index: 1000;
}
the “#masthead-site-header” is neccesary. Otherwise the hero slider will overlap subentires of the top menu. Thanks again!