What type of macromolecule is cortisol?

Biological macromolecules are large molecules, necessary for life, that are built from smaller organic molecules. There are four major classes of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids); each is an important cell component and performs a wide array of functions.

What a model shows is  a practical solution for some research by showing systems that have different sizes. Models are simplified representations of real objects/systems . you can make it easier  by zooming on a large system. You can also do something else to make it easier.