pull down menu

1.Pull-down menu

Also called a "drop-down menu" or "pop-down menu," the common type of menu used with a graphical user interface (GUI). Clicking a menu title causes the menu items to appear to drop down from that position and be displayed. Options are selected either by clicking the menu item or by continuing to hold the mouse button down and letting go when the item is highlighted.

On Web pages, menu items are often displayed automatically as soon as the cursor is positioned over the menu title. JavaScript is widely used to implement pull-down menus on the Web. See JavaScript.
from : http://www.pcmag.com/encyclopedia_term/0,1237,t=pull-down+menu&i=49949,00.asp

2.Menu (computing)

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It has been suggested that Menu bar be merged into this article or section. (Discuss) Proposed since February 2012.

In computing and telecommunications, a menu is a list of options or commands presented to an operator by a computer or communications system.

Choices given from a menu may be selected by the operator by a number of methods (called interfaces):

• entering the identifier for the desired menu item from a keyboard
• positioning a cursor or reverse video bar by using a keyboard, mouse, or remote control D-pad
• using an electromechanical input device, such as a light pen
• touching the display screen with a finger
• speaking to a voice-recognition system

Contents 1 Types of menus 2 Sub-menus 3 See also 4 References 5 External links

Types of menus

Text-based menu in an application program

A computer using a command line interface may present a list of relevant commands as a memory aid to the operator. The operator may then enter a selection from the menu at the command line.

A computer using a graphical user interface presents menus with a combination of text and symbols to represent choices. By clicking on one of the symbols or text, the operator is selecting the instruction that the symbol represents. A context menu is a menu in which the choices presented to the operator are automatically modified according to the current context in which the operator is working.

A common use of menus is to provide convenient access to various operations such as saving or opening a file, quitting a program, or manipulating data. Most widget toolkits provide some form of pull-down or pop-up menu. Pull-down menus are the type commonly used in menu bars (usually near the top of a window or screen), which are most often used for performing actions, whereas pop-up (or "fly-out") menus are more likely to be used for setting a value, and might appear anywhere in a window.

According to traditional human interface guidelines, menu names were always supposed to be verbs, such as "file", "edit" and so on.^[1] This has been largely ignored in subsequent user interface developments. A single word verb however is sometimes unclear, and so as to allow for multiple word menu names, the idea of a vertical menu was invented, as seen in NeXTSTEP.

Menus are now also seen in consumer electronics, starting with TV sets and VCRs that gained on-screen displays in the early 1990s, and extending into computer monitors and DVD players. Menus allow the control of settings like tint, brightness, contrast, bass and treble, and other functions such as channel memory and closed captioning. Other electronics with text-only displays can also have menus, anything from business telephone systems with digital telephones, to weather radios that can be set to respond only to specific weather warnings in a specific area. Other more recent electronics in the 2000s also have menus, such as digital media players.

Sub-menus

Menu and expanded sub-menu

Menus are sometimes hierarchically organized, allowing navigation through different levels of the menu structure. Selecting a menu entry with an arrow will expand it, showing a second menu (the sub-menu) with options related to the selected entry.

Usability of sub-menus has been criticized as difficult, because of the narrow height that must be crossed by the pointer. The steering law predicts that this movement will be slow, and any error in touching the boundaries of the parent menu entry will hide the sub-menu. Some techniques proposed to alleviate these errors are keeping the sub-menu open while moving the pointer in diagonal, and using Mega Drop-Down menus designed to enhance scannability and categorization of its contents.^[2][3]

^{from: http://en.wikipedia.org/wiki/Pull-down_menu}

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