Hi
You can add drop down by going to Dashboard > Menu > Click on 8Theme Category Option https://prnt.sc/zgeijh and popup will open then select your require mega menu static section https://prnt.sc/zgeo0j
kindly read the following documentation about menu.
https://www.8theme.com/documentation/xstore/menu-set-up/
https://www.youtube.com/watch?v=OnxkixHtVLI
Video Tutorial About Mega Menu
https://www.8theme.com/documentation/xstore/video-tutotials/03-how-to-create-a-mega-menu/















