Models can become difficult to navigate because of how large they can become. For this reason we have the Outline View which can be expanded by clicking the four bulleted row icon in the upper right corner.
This gives a consolidated view of your model from a code object standpoint. You can see the outline of your model as well as navigate to different lines of code simply by clicking on the relevant entry in the outline. Selecting a function or variable will also highlight the relevant object in the editor to make it easily seen.
Functions contain, as child elements, the variables contained within them. Every function in the document will show up in this list. Each function will be represented by the following icon:
Every variable in the document will show up individually in the outline view. They will each be represented by the following icon: