Folding

This step shows how to enable collapsing and expanding of group nodes . This is provided through class FoldingManager and its support classes.

GraphEditorInputMode provides the following default gestures for collapse/expand:

Press CTRL+Numpad + or click the expand-button on the node's top left corner to open (expand) a closed group node.
Press CTRL+Numpad - or click the collapse-button on the node's top left corner to close (collapse) an open group node.
Press CTRL+Return to enter (navigate into) a group node.
Press CTRL+Backspace to exit (navigate out of) a group node.

See the sources for details.