Hi Everyone
I know it's a silly question, but I don't get the point about how to use the Node Graph to display different edge, in my case now I'm trying to display just one edge, here a query that provide the DCF connection between 2 element, both present in the Graph 
I setup the Graph with another query that retrive few element, then i set the element ID as Node ID for each node.
Now my problem is, why if i insert the query with the connection to provide the edge connection in the graph, nothing change? What I missed? How it's work under the hood the edge creation?
From the documentation I found, there is no necessary so much work, just providing the ID for the source and the destionation of the edge.
Can someone explain better how it works? or in case just let me know if there is a documentation with more information about it.
First of all, there's not such thing as a silly question!
Secondly, based on what I can see on your screenshots, your configuration looks perfectly fine. Node-edge is indeed just about specifying which column of the nodes query represents the id of a node. The config of an edge is merely marking the columns that will contain those node ids, as source and destination.
Both node and edge configs look fine, so we might have encountered an issue here. I would suggest to reach out to our support so we can properly investigate why your edges are not appearing.