I've been trying to do it like in this post, but it did not do not what I was expecting:
Is it correct that only columns with content count as "childs"? Which for me is a problem because of mobile.
What I am trying to do: having white text on black background in column 3 (which works, choosing child no. 1), but I would like the second column (left to the text) to be black as well. Also, I would like to layout some other pages with black areas in them.
Thanks for any suggestions!