The Favourites pane (next to Files) can be used to store nodes (e.g. an Actor) that you want to use again in several nodes. Just "drag-and-drop" nodes from the Local Corpus or the Remote Corpus to Favourites to store them there. From now on you can "drag-and-drop" them from Favourites to any fitting position in your Local Corpus, or add them to a node via the right-click menu (using Add From Favourites).