Main Page | See live article | Alphabetical index In computing, a check box is a graphical user interface element (widget) that indicates a two-way choice or state (true/false) which can be edited by the user. Normally, check boxes are shown on the screen as a square box that can contain white space (for false) or a tick mark or X (for true). Adjacent to the check box is normally shown a caption describing the meaning of the check box. Inverting the state of a check box is done by clicking the mouse on the button, or the caption, or by using a keyboard shortcut. See also radio button. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.