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The alt attribute is the HTML attribute used in HTML and XHTML documents to specify alternative text (alt text) that is to be displayed in place of an element that cannot be rendered. The alt attribute is used for short descriptions, with longer descriptions using the longdesc attribute .
A screen reader will default to reading out the image filename when no alt text is available. [5] [6] The alt attribute can only contain plain text (no HTML or wiki markup such as wikilinks) without line breaks. The alt text is read by screen readers before the caption, so avoid duplicating the caption.
In keeping with other Internet guidelines, the term "alt text" (in a code font) is used here to refer to the text supplied for the image alt parameter and which generates text for the HTML alt attribute; the term "alternative text" refers to the text equivalent for an image, regardless of where that text resides. [4]
Windows: Alt key codes. The alt keys (there are two of them) are easy to find on any Windows device—there’s one on either side of the space bar. It’s easy to make any accent or symbol on a ...
In SGML, HTML and XML documents, the logical constructs known as character data and attribute values consist of sequences of characters, in which each character can manifest directly (representing itself), or can be represented by a series of characters called a character reference, of which there are two types: a numeric character reference and a character entity reference.
Alt + U. Change text to upper case. The Alt key has numerous other program-specific functions, like pressing Alt + G to access the Design tab in PowerPoint, or Alt + A to open the Data tab in Excel.
In the first example, without an LRM control character, a web browser will render the ++ on the left of the "C" because the browser recognizes that the paragraph is in a right-to-left text and applies punctuation, which is neutral as to its direction, according to the direction of the adjacent text. The LRM control character causes the ...
This guideline includes alt text for LaTeX-formatted equations in <math> mode. See Wikipedia:Manual of Style/Mathematics § Alt text. Do not insert images in headings; this includes icons and <math> markup. Doing so can break links to sections and cause other problems.