First of all, thank you a lot for the reply here (Togglinh light and Syntax difference - Rendering - Epic Developer Community Forums).
Secondly I would like to ask (just can’t figure it out) how I can make 2 objects to be on the same level. I mean, when I try to use “OnActorBeginOverlap” how you showed in your example, I can’t use TriggerVolume as it’s “component”… How I can add it, because in my case, the brackets after “OnActorBeginOverlap” are staying empty there are no brackets. I will be very thankful
P.S. Sorry for the dump questions, I’m pretty new and really want to learn how to use UE4.
In order to use a component in the level blueprint, you have to get a reference to that component. In order to do this, select your Trigger Volume in the level, open the level blueprint, right-click. At the top of the window that pops up when you right-click, you should see options relating directly to your trigger volume. From these options, expand the Add Event for Trigger Volume drop down, expand the Collision tab, and then select On Actor Begin Overlap. This should give you an On Actor Begin Overlap Node with a direct reference to your Trigger Volume. This means that the event will trigger when something (which you can set specifically, or just leave it to when anything overlaps) overlaps the Trigger Volume. Hope that helps.
Here’s what the pop-up window will look like when you have your Trigger Volume selected and then right-click in the level blueprint (ignore the other nodes, those are from when we set up the toggle point light):
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