An outline is being defined as a 2 dimensional shape which is the answer. The outline also known as the list being arrange to portray the hierarchical relationship and known as a tree structure. It is used in order to portray the main points or a topic in a subject.
Very cute think what kind are they
Organizing all of the visual elements of the work.
Check out this link: https://360ideas.com/advertising-hierarchical-scale-in-marketing/
I think it'll sum it up for you. Hope it helps!
