Validation level: 0. Unspecified
A drop-down or (cascading) pull-down menu shows, when opened, a list of commands or options. It can be fixed to the side of the screen, and contain nested items.
A drop-down menu first appeared on the Xerox Alto computer, as part of the WIMP interaction style. Since then, there have been many attempts to facilitate the access to the menu's (nested) items. Examples are the Bubbling Menu, Ephemeral Menu, Force Field Menu and Motion Menu.
By: Neff Walker, John Smelcer
Modeling and improving selection in cascading pull-down menus using Fitts' law, the steering law and force fieldsConference: CHI '05, 2005
By: David Ahlström