Page Sub Menu, is possible to change the height?

Hello,

This is Definitely Possible. Please consider adding the following CSS Code:

#page-menu,
#page-menu-wrap,
#page-submenu-trigger {
	height: 60px;
	line-height: 60px;
}

@media (min-width: 992px) {

	#page-menu nav > ul { height: 60px; }

	#page-menu nav > ul > li > a {
		margin-top: 16px; /* Calculate: ( ( 60px - 28px ) / 2 ) */
		margin-bottom: 16px; /* Calculate: ( ( 60px - 28px ) / 2 ) */
	}

	#page-menu ul ul { top: 60px; }

}

@media (max-width: 991px) {
	#page-menu nav { top: 59px; } /* Calculate: ( 60px - 1 ) */
}

This will definitely work fine. Let us know if we can help you with anything else or if you find any further issues.