What's new -> Show the items of Categories

[peeter]

Hello,

 

I have a problem.

 

In the main page, there are the latest products below the "What's new" title.

 

I had made some 4 main categories, and in these categories, I made some "sub-categories" which contains the products.

 

I'd like to list these sub-categories in the area below "What's new". How can I do this?

 

Thanks