See attached photo. I am not referring to the width of the menu but the space below the menu and the first block of data.

But how can I open a Youtube-Video in the Magnific Popup by click on an Link?

I can recommend you only to make your menu shorter by removing some items or adding them to the submenu.

I'm using Header Builder and have a long menu. It displays fine in desktop layout but when I shrink the browser window it resorts to 2 lines before it reaches tablet size and forces the hamburger menu

Please, go to Betheme -> Theme options -> Blog, Portfolio & Shop -> Shop, and from Product image dropdown menu select Disable zoom effect.

But can you tell me how did you test your product? Because if you open it with your dev account then it will be visible to you.

.menu li ul.sub-menu{

You can achieve that by adding CSS Class in menu item.

1) To turn off the share buttons, please, go to Betheme -> Theme options -> Blog, Portfolio & Shop -> General, and select Hide from Share Box dropdown menu.

Please, go to Betheme -> Theme options -> Header & Subheader -> Subheader, and from Style dropdown menu select Title & Breadcrumbs Centered.

To do that, go to Betheme -> Theme options -> Global -> General, and from Style dropdown menu, you need to select Disable hover effect.

I would like to add Ajax Search for WooCommerce to my website and keep the search bar as it is on the menu right now (I am using your header builder).

I would like to color one menu in order to attract visitor's eyes.

All of the instructions about the mega menu are on that video and topic below:

The type of menu the "BePortfolio" is a "Under Slider", you can select it in the Theme Options>Header&Subheader>Header, and to make it slide,

After that click on the button, select Actions from menu on the right, and from the window that will appear click on trash bin icon.

#Top_bar .menu > li > a{

   .menu{

#Footer .menu a:hover{

As you can see in the footer, when you go over the links menu they get white and the background is white too.