Create sub page or chapters navigational as like Wikipedia app contents . <img src="https://user-images.githubusercontent.com/13943321/142765454-33924aca-d53d-4342-ae27-21cb3b7e7484.jpg" width=200/> <img src="https://user-images.githubusercontent.com/13943321/142765455-bf0d9ac5-a358-403f-a500-20cc808345b8.jpg" width=200/>
