I'm not sure that we understand each other. Take this article for an example. It's "text" article and background color of website is white and you can see image and text below. But if you change inside that article from "text" to "gallery", that that article would look like this, where you can see that background is changed to black and images are automatically linked to slider, no extra class inside <img src> tags.
So I want to have that option inside SEBLOD, to change from "text" to "gallery" or "video".