To make your mobile menu appear on a larger screen size. Login into WordPress admin and in the custom CSS box, add the following code:

@media only screen and (max-width: 1450px) and (min-width: 961px) {
#et_mobile_nav_menu {
display: block;
}
#top-menu {
display: none;
}
#main-header {
position: absolute !important;
}
}