This tutorial will show you how to add drop down menus in Main Menu module in Prestashop.
Adding a product category sub-menu to your navigation menu
- Add a new product category link to the top menu :
- Navigate to Modules -> Modules & Services and look for Main menu.
 - Click the Configure button to access the module configuration page:
 - To add a new element to the front-end menu, you should select the required element on the right and click the Add button:
 - Click Save to confirm adding a new menu item for the top menu.
 
 - Add a new sub-category to your product category.
- Navigate to the Catalog -> Categories menu. To create a new sub-category, click on the Add New button from any level of categories:
 
 - Navigate to the Catalog -> Categories menu. To create a new sub-category, click on the Add New button from any level of categories:
 
This sub-category will be displayed as a drop-down menu button for product category automatically.
Adding a CMS pages sub-menu to your navigation menu
- Create a new Page category.
- Navigate to Design -> pages and click Add new Page category button:
 - Fill in the choices suggested and click ‘Save’ button.
 
 - Navigate to Design -> pages and click Add new Page category button:
 - Add a new Page category to the top menu :
- Navigate to Modules -> Modules & Services and look for Main Menu
 - Click the Configure button to access the module configuration page.
 - To add a new element to the front-end menu, you should select the required element on the right and click the Add button.
 - Click Save to confirm adding a new menu item for the top menu.
 
 - Navigate to Modules -> Modules & Services and look for Main Menu
 
- Create a new page.
- 
- Navigate to Design -> Pages and click Add new page button:
 - Fill in the choices suggested and click ‘Save’ button.
 
 - Navigate to Design -> Pages and click Add new page button:
 
 - 
 
This page will be displayed as a drop-down menu button for Page category automatically.