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The content from a template titled Template:foo can be added into a Wikipedia page by editing a page and typing {{foo}} into it. When then viewing the page, {{foo}} is automatically replaced by the content of the page "Template:foo". If the page "Template:foo" is later altered, all the pages with {{foo}} in them will change automatically.
Scale the image to be no greater than the given width or height, keeping its aspect ratio. Scaling up (i.e. stretching the image to a greater size) is disabled when the image is framed. Link Link the image to a different resource, or to nothing. Alt Specify the alt text for the image. This is intended for visually impaired readers.
MediaWiki stores rendered formulas in a cache so that the images of those formulas do not need to be created each time the page is opened by a user. To force the rerendering of all formulas of a page, you must open it with the getter variables action=purge&mathpurge=true. Imagine for example there is a wrong rendered formula in the article Integral
Markdown - simple plaintext markup popular as language of blog/cms posts and comments, multiple implementations. [2] Mathematical Markup Language (MathML) Scalable Vector Graphics (SVG) TeX, LaTeX – a format for describing complex type and page layout often used for mathematics, technical, and academic publications.
An image sometimes includes a familiar object to communicate scale. Such fiducial markers should be as culturally universal and standardized as possible: rulers, matches, batteries, pens/pencils, footballs (soccer balls), people and their body parts, vehicles, and famous structures such as the Eiffel Tower are good choices, but many others are possible.
Markdown [9] is a lightweight markup language for creating formatted text using a plain-text editor. John Gruber created Markdown in 2004 as an easy-to-read markup language. [9] Markdown is widely used for blogging and instant messaging, and also used elsewhere in online forums, collaborative software, documentation pages, and readme files.
Free images that can be reused commercially and modified are preferred. Non-free images may sometimes be used, but only in certain circumstances. Wikimedia Commons accepts only free images, which can then be used by any of the other Wikimedia projects. To use an image in an article, insert: [[File:Image name.jpg|thumb|Caption for the image]].
The application makes easier and faster the edition of articles, even if the user lacks previous knowledge of the markup rules. It helps to prevent mistakes during the process of edition, and to pay less attention to the syntax.