Abstract: A software utility navigation aid for hierarchical structures such as file managers, taxonomies, or tables of contents that displays a dynamic menu when the mouse cursor is hovered over an activator used to swap the expanded/collapsed state of a node displayed in a hierarchical structure. The menu contains entries that identify in which display level of expansion the node resides based on the structure's fully collapsed condition (from the root node), the number of display levels to which this branch of the hierarchy can be expanded, and the number of nodes that will be exposed when this branch is expanded to each of those levels. Each displayed entry in this menu, positioned both below and above the identified node, can be clicked to cause the hierarchical structure to expand or collapse to that display level.