Can I use UE4 source code in a report?

Hi Guys

I have quick question.I have studied UE4 navigation source and I would like to document this work wirh screen shots and explanations of the flow of the code?I am aloud to use screen shots of the source?Note that this is for educational purposes only

THanks
Ethan

Per the EULA:

You are permitted to post snippets of Engine Code, up to 30 lines of code in length, online in public forums for the sole purpose of discussing the content of the snippet and not for the purpose of enabling non-Engine Licensees to use or modify any Engine Code, or to aggregate, recombine, or reconstruct any larger portion of the Engine Code.