Just use

The backend of Contenido is designed in a way that users without comprehensive IT-skills are able to manage and create content of online services. Just about the insite-editing functionality of Contenido, it is possible to edit contents directly in a future layout of the website. This is an important component of the usability of Contenido and belongs to the core elements. In this case, editing contents is very easy for editors.

By consequently separating layout and functionality, new elements and functions can extend the base of Contenido in an easy way.