Thanks a lot Jaynabonne,
there is just one small problem: my Chromebook does not have F12
But in case that someone gets here too, here is the solution for the INSPECT ELEMENT feature:
browser->menu->More Tools->Developer Tools
So now the only problem is to know how to create my own theme.
I can now see that there is a DIV called cameContent. What i would like to do is to create this part to adapt to my visions.
As it is possible to "inject" HTML elements via jQuery i will try this way. What i would love to have is some kind of HTML framework development.