Select the node for which you want to
see the connections, then click one of the following icons on the
Hypershade main toolbar.
(Point to an icon to display its name.)
NoteInput and output
connections are sometimes called upstream/downstream connections.
Input Connections
Displays
the input connections of the selected node. Input connections are
those Maya automatically creates depending on the node type.
Output Connections
Displays
the output connections of the selected node. Output connections
show the Shading Group Node. Double-click
the Shading Group swatch to open
its Attribute Editor.
Input and Output Connections
Displays both the input and output connections
of the selected node.