We mean by node scope the node container. We can change node scope using:
Displace Action configuration: if we displace a node while holding Shift key down. Scope change can be handled and configured via the DisplaceActionData properties. SeeWorking with available actions section.
scope change methods: by using the changeNodeScope method in Visualizer or changeScope method in the Table it is possible to change the cell containing the node inside a table. This is the only way to change node scope programmatically.
Changing link scope
We mean by link scope link source and target. Because several operations are required to perform the link scope change, using the changeLinkScope method is the only way to change a link scope without creating a new instance. If you change only source and target properties of the node, the scope change will not be taken into account and malfunction may occur.