Viewing the component node graph

When a component node is selected, Edit component appears in the Edit menu and the contextual menu.

Select this entry to open a window containing the component graph.

Two nodes are added automatically to the graph for each input and output node:

Component input: Node input connector.
Component output: Node output connector.

When you select a node in the component node graph, its corresponding terrain or mask appears in the Viewport. As such, you can see what is happening inside a component node.