The NodeGraph node can be accessed from Create Nodes > New NodeGraph
Edit Node - Opens the Octane NodeGraph window. Changes are saved back to this node once you close the NodeGraph window. The Octane Viewport must be open to use this command, and this node must be used by the material.
Copy To Clipboard - Copies the NodeGraph's XML to the system clipboard.
Paste From Clipboard - Pastes the XML from the system clipboard into this node.
Input User Channels - If the node graph contains Octane Input nodes, the plugin will add a Modo User Channel for each input, allowing you to connect Octane nodes to the NodeGraph. Input channels will appear after closing the NodeGraph editor window.