Reply To: main navigation drop down on hover

Hello,

Please check this manual: https://codex.wordpress.org/WordPress_Menu_User_Guide provides detailed instructions on creating/editing/saving menus.

I want this in main navigation. Tell me which button should i choose ? pages or posts or what from left side ?

You add the items that you want to see in the drop-down, you need to add these items as the sub-menu items.

Best Regards