Right-click empty canvas for the same list. Drag from a node's dot to wire it. Click a node below to drop it onto the canvas.
A dimmed field means a wire is feeding that input, so the wire's value wins and the field is locked. Unplug the wire to type a value again.
Shortcuts: Del removes the selection. Ctrl+C / Ctrl+V copy and paste (also how you duplicate a node). Ctrl+A selects all. Ctrl+Z / Ctrl+Y undo and redo. F fits the graph on screen. Double-click empty canvas to search every node by name.
Downloads as <name>.lua. Put it in your game folder's
scripts/OnKey/, load a save, then press the key set on the On Key Press node.