Hello, I know that there exists an article about: how to "open" a submenu of a submenu on the left side. Unfortunately I c an not fount this article.
I am using CMS 2.7. On the left side I have a "Categorie" with Cat1, ..., Cat5. Under Cat1 I have again SubCat1_1, ... SubCat1_4. When clicking on Cat1 SubCat1_1, .. SubCat1_4 should open.