Blackboard key - how to change it etc.?

Well, you can access variables in the blueprint graph, and you can create and modify your blackboard keys. Both those things already happen in the blueprint you showed. I’m not sure i understand your question…

Hi. I’m using plugin for dialogues, which is handled in Behaviour trees. Dialogue System - Work in Progress - Unreal Engine Forums - link to it.

I have the BTS Main blueprint for this blackboard. I think it’s somehow connected with the behaviour tree - by the plugin, I guess - and looks like this: BTS_Main posted by anonymous | blueprintUE | PasteBin For Unreal Engine 4

There is something made as a condition/key, right (Is Talking variable)?
I just wanted to ask, how I can add my condition, my key to my behaviour tree? What I think I know is they all are connected with this blueprint, so I can;t really change anything there - it’s like a parent, and I want to make individual changes to every other dialogue tree.
I can add a key, and then set it up here: Imgur: The magic of the Internet Imgur: The magic of the Internet
However the problem is, how can I manipulate this variable? How can I change it in different blueprint?

This variable Is talking in BTS Main blueprint is somehow connected with Top Down Character BP and can be called at any time. Without editing this BTS ain blueprint, can I somehow add my condition, and how can I access it?

Sorry for kinda dumb question, I’m just trying to make it work and I don’t really know Behaviour Trees etc.

Thanks.