1. Choose Mega Menu:
Please go to Template Manager, in Top Menu Settings tab, choose Mega Menu in Default Menu Style field.
2. Config in Menu:
Please go to Main Menu, open 'YT Menu Params for this Menu Item' tab in right column. You can config mega menu in MEGA CONTENT SETTING.
Number of Columns: You can choose number of column for sub-menu of this menu.
Content Width (px): Width total columns.
Column Width (px): Width of every column, width of every column can different, separated with comma.
Mega Content Type: Every column can display menu item, module type or position of module.
If it was chosen position of module, you have to go to Module Manage, search module in that position, and edit those module to display in your module.


Thanks.