Deconstructing Particle Examples
The documentation included with this example is intended to help you get off the ground and see what is going on with each of these Particle System effects. However, if you really want to gain a solid understanding of how each one was created, you would do well to open them up and have a look at how they were assembled. Throughout these documents, we will give the folder path you can use to locate each effect within the Content Browser. Alternatively, you can also simply select an effect that interests you, either by clicking on it in the Viewport or in the World Outliner, and then pressing Ctrl+B. You can also right-click on the Actor (in the Viewport or the World Outliner) and choose Show in Content Browser from the context menu.
This will select the Particle System in the Content Browser. Double-click its icon in the Content Browser to open the effect up in Cascade, Unreal Engine 4's powerful particle editing system.