The ability to directly interact with (or manipulate) a node or a link in an overview diagram and view information contained within a node (or traverse to the next node) can be considered as a reactive choice. Previewing a node and the links to and from it (which can be highlighted showing a subset of the network) is another reactive choice. The ability to mark a node which has been visited using timestamp or footprint mechanisms is another reactive choice. Other reactive choices include marking a text item, creating elaboration links, and selecting from a list of objects. The ability to mark and annotate will help the user to store and manipulate retrieved information in order to integrate with other work. Reactive choices can include the ability to directly manipulate the contents of documents within a template such as editing, deleting, creating new links etc.