Mega menu is the submenu which display post title along with its feature image in the menu location as shown below. It is available in Premium version only.

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How to apply mega menu feature in your website.

Step1. Go to appearance >> customize >> menu

Step2. Open screen options and there you can find checkbox named as CSS classes. Select it.

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Step3. Add custom link in the menu and add class name as “mega-menu” in the place defined under ” CSS Classes”. Now add submenu under this menu . Your submenu could be one of the listed below.