How did I make this variable a Class Reference?

[ClockworkOcean]

@ConradG

The picture attached is a structure of maps (dictionaries) where all Keys are Names and the Values differ depending on type.

My question is about the purple Class References which in the tooltip states the “Value Type: Class Reference”
I am trying to make the purple Actor Value match the rest of the purple Class References but I don’t know how I made these Class References in the first place.

I’ve tried to use Object instead of Actor, but then it displays Object… How did I make the “Class Reference” as a variable type?

You selected it from the various options: