Display Categories, and under them products with picutes

Hello.

My website needs to display the categories in the main menu, but under them not the subcategories but some products in that categories with pictures.

Is this possible?

Hello dimitrishd,

there is no such possibility in the default nop-commerce system.

However, if you need any modifications done on your site you can look at our new service called Theme Tweaks.
It allows you to hire us to do any customizations you need on your site and only us for the time it takes us to do it.