The position of Module news in frontend:

On the frontend, when clicking on module News at main menu, you will see all the content of this module.

Now, we will move to backend to edit module News:

To edit those module on the menu. In the backend, please go to Administrator ->>Component ->> K2 ->> Categories. Then filter with keyword "News"

Then click in this article, you can edit and choose 1 available layout config which you want to show on the frontend: 

How to edit the content of module "News":

In the administrator, please go to Component ->> K2 ->> Items. You will see a list of articles belong to news module. Your duty is too simple. Just click on any article which you want to change/edit...