Bread Crumbs

When you are navigating through an unknown environment, whether it be a city, a forest or a hyperdocument, you always face the danger of getting lost. A common technique, from fairy tails to actual life, to avoid not finding your way back, is to leave marks behind. When you leave "bread crumbs" behind, you will recognize a node that was visited before. So the bread crumbs facility is most useful when the system does not provide the highlighting links facility (which already indicates you have already visited the node, before actually following the link that gets you there). Also, the bread crumbs facility assumes the user has a poor memory. Experience shows that text nodes that are illustrated with figures are easily recognized when visited a second time, without the need for the bread crumbs facility.