Selectable objects in a computer display are arranged in a cascading menu including parent menu and submenu objects in which an activation area is provided in association with each submenu displayed which spans between the submenu and the associated parent menu object. The activation area provides the function of maintaining display of a submenu associated with a selected parent menu object while the cursor remains in contact with the activation area. An override function is provided to minimize trapping of the cursor within the activation area. The shape of the activation area is generally triangular with opposing side edges extending from an apex and the parent object being curved inwardly towards one another to also minimize trapping. The characteristics of the activation area can also be varied according to user motion patterns.