Copy Node the picked node and all its descendants are ungrouped from its parent DAG node. The parent DAG node and all its transformations are copied and the copy becomes the new parent DAG node for the picked node. If the node is an instance, an error message will appear on the information line. If the parent node is an instance, nothing happens. Copy Node makes the current node have its own parent, if it doesn't have one already.
Transformations are copied.
A new parent is grouped with the parent's parent. If the parent has no parent, a new group is formed. Collapse used to simplify complicated sections of curves or surfaces by collapsing all the nodes below a given DAG node into one single level. If the picked node is an instance, an error message is displayed on the information line. If there is an instance in the group, the collapse is only performed below the lowest instance.