Studying projects

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:bust_in_silhouette: Asked By squareboy123
:warning: Old Version Published before Godot 3 was released.

Hi, I know it’s a stupid question but I’m learning Godot and I would like to know how I could study a project to put the systems in my project, for example:

Escoria - point and click, how can I study and understand only the part of moving with clicks (discarding other systems, only this part identifying in the code)?

Not just Escoria but any project.
.

sorryformyenglish