Please, I need to see the edges above the nodes A client's PC and Server, e.g. to see the connection between Terrain data and nfi_analytical, not hidden under the nodes A client's PC and Server. Is it possible in y.ed live?
In yEd Live you need to use group nodes for your "background" nodes and properly assign your "foreground" nodes as child nodes of the respective group node to get the desired behavior.
Sample GraphML.