I made a particle emitter and a jumppad following the tutorials and now I want to activate the emitter (that destroys itself upon completion) when the player actor overlaps the jumppad. How do I get a reference of the particle emitter inside jumppad’s blueprint?
Hi. 
What you’d wanna do is just create another component in the jump pad bp. Make it a particle system and set it to the one you want to use. Make sure u scroll down in the details panel with the particle system selected and uncheck auto activate.
Go into the graph and drag the component over that is your particle system. Drag a wire from that particle system and type activate. Plug in the execution wire when you over lap and…tadaaa. )