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A radio button or option button [1] is a graphical control element that allows the user to choose only one of a predefined set of mutually exclusive options. [2] The singular property of a radio button makes it distinct from checkboxes , where the user can select and unselect any number of items.
Map radial lines. When used in the context of planning for a transmission system, radial lines are a concept used when describing a radio station's broadcast range: The radials in this case are several lines drawn on a map, radiating from the transmitter, with evenly spaced horizontal bearings. The radial extends as far as the transmitted ...
In user interface design, a pie menu or radial menu is a circular context menu where selection depends on direction. It is a graphical control element. A pie menu is made of several "pie slices" around an inactive center and works best with stylus input, and well with a mouse. Pie slices are drawn with a hole in the middle for an easy way to ...
In computer menu functions or buttons, an appended ellipsis ("…") means that upon selection, another dialog will follow, where the user can or must make a choice. [5] If the ellipse is missing, the function will be executed upon selection. "Save": the file will be overwritten without further input.
Playback controls on a CD player. Control symbols on a Sony Betamax Portable.. In digital electronics, analogue electronics and entertainment, the user interface may include media controls, transport controls or player controls, to enact and change or adjust the process of video playback, audio playback, and alike.
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It is used instead of a push-to-talk button on transmitters or to save storage space on recording devices. On cell phones , it is used to save battery life. Intercom systems that use a speaker in a room as both a speaker and a microphone will often use VOX on the main console to switch the audio direction during a conversation.
Federal workers in Washington, D.C., are experiencing job instability for the first time ever, and the whole city is in a "panic," according to one report.