Howto create bluish SET value on Blackboard? (see image)

Attached screenshot shows “SET” value on a blackboard, the documentation can be found here https://docs.unrealengine.com/latest/INT/Engine/AI/BehaviorTrees/QuickStart/9/index.html

However, could someone point out what kind of search string i need to seek for this “SET” thingy? Thx

Ok, to answer myself. I have to right click the blackboard (not create a node) and then seek for “AI_C…”. Then select “Set AI Con Ref”…