You have to know the difference between the particle system and the particle emitter. The particle system is the actual asset itself, which means it is an asset you can create in your content browser, and it is the final look of what you are building inside Cascade and the one used inside the game. The emitter is the unit used to create a system, which means the particle system could be made out of one particle emitter, five emitters, or even an unlimited amount of emitters!

As a particle system is made up of one or more particle emitters, this is the place where you can add, select, edit, and arrange your emitters. Think about it as a graph area like the one with the Material Editor, or even like the Blueprint graph. This is where you put the actual content!

As it is just an area for all the emitters, you can call it The emitter list, as lots of people do:

It contains a horizontal arrangement of all the emitters within the current particle system and, regardless of the amount...