| 摘要 |
Menu items are displayed on a screen, for example in the form of user-activatable on-screen buttons. A root menu is displayed, including a "more" button that allows the user to navigate to one or more sub-menus. Each menu can contain function buttons, menu buttons, or any combination thereof. Function buttons provide direct access to functions. Menu buttons provide access to sub-menus, which may be provided in a hierarchical arrangement. In some sub-menus, a menu title button replaces the "more" button and provides access to a previously displayed menu. The user can activate a displayed function button in any menu or sub-menu to perform an action associated with the function button. In one aspect, all menus are displayed in the same area of the screen. When a menu is to be displayed, it replaces the previously displayed menu. By presenting only a limited set of buttons at any given time, the present invention provides access to functions without obscuring the workspace.
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