< All Topics Main Introduction Apendix Category Hierarchy and Tabs Layout Print Category Hierarchy and Tabs Layout PostedJanuary 25, 2021 UpdatedJanuary 25, 2021 Byfeuxm 0 out Of 5 Stars5 Stars 0%4 Stars 0%3 Stars 0%2 Stars 0%1 Stars 0%Tabs Layout uses top categories for its tabs, and therefore, it cannot contain articles. Add your articles to sub-categories.