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Help:Images

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__TOC__==Uploading images==See our requirements for This page explains the '''image''' syntax when editing the wiki. You or another user must usually [[Upload imagesHelp:Managing files|uploading imagesupload an image]]before you can use it on a page.
Images that are stored on a MediaWiki server are usually rendered by using the <code>File:</code> namespace prefix (but the legacy <code>Image:</code> namespace prefix is still supported as a synonym) as the target of a MediaWiki link. The alternate <code>Media:</code> namespace prefix is also usable to reference the original media file content (for rendering or downloading it separately, out of any MediaWiki page).
==Quick guide Supported media types for images ==The following file formats are supported by default:* .jpg or .jpeg : bitmap image compressed in the standard JPEG format (this lossy format is most suitable for photographs).* .png : bitmap image in the ''Portable Network Graphics'' format (specified by the ''W3 Consortium'').* .gif : bitmap image in the legacy ''Graphics Interchange Format''. Other media types may be supported, but it may not be possible to display them inline.== Rendering a single image == === Syntax ===The full syntax for displaying an image is: <nowiki>[[</nowiki>File:''filename.extension''|''options''|''caption'']] where ''options'' can be zero or more of the following, separated by pipes ('''|'''):* ''[[#Format|Format]]'' option: one of '''border''' and/or '''frameless''', '''frame''', '''thumb''' (or '''thumbnail''');*: Controls how the rendered image is formatted and embedded in the rest of the page.* ''[[#Size and frame|Resizing]]'' option: one of** ''{width}'''''px''' — Resizes the image to using fit within the given maximum width in pixels, without restricting its height;** '''x'''''{height}'''''px''' — Resizes the image to fit within the given maximum height in pixels, without restricting its width;** ''{width}'''''x'''''{height}'''''px''' — Resizes the image to fit within the given width and height in pixels;** '''upright''' — Resizes an image to fit within reasonable dimensions, according to user preferences (suitable for images whose height is larger than width).*: Note that the image will always retain its aspect ratio, and can only be reduced (not increased) in size unless it's in a scalable media type (bitmap imagescannot be scaled up).*: The default maximum size depends on the ''format'' and the internal image dimensions (according to its media type).* ''[[#Horizontal alignment|Horizontal alignment]]'' option: one of '''left''', '''right''', '''center''', '''none''';*: Controls the horizontal alignment (and inline/block or floating styles) of the image within a text (no default value).* ''[[#Vertical alignment|Vertical alignment]] option'': one of '''baseline''', '''sub''', '''super''', '''top''', '''text-top''', '''middle''', '''bottom''', '''text-bottom''';*: Controls the vertical alignment of a non-floating inline image with the text before or after the image, and in the same block (the default vertical alignment is '''middle''').* ''[[#Altering the default link target|Link]] option'': one of** '''link='''''{target}'' — Allows to change the target (to an arbitrary page title, or URL) of the generated link, activable on the rendered image surface; e.g. <code><nowiki>[[File:Example.jpg|20px|link=http://www.wikipedia.org]]</nowiki></code> renders as [[File:Example.jpg|20px|link=http://www.wikipedia.org]] (external link), or <code><nowiki>[[File:Example.jpg|20px|link=MediaWiki]]</nowiki></code> renders as [[File:Example.jpg|20px|link=MediaWiki]] (internal link).** '''link=''' (with an empty value) — (MediaWiki 1.14+) Displays an image without any activable link; e.g. <code><nowiki>[[</nowiki>File:Example.jpg|20px|link=]]</code> renders as [[File:Example.jpg|20px|link=]].<!--*** '''!''' Link does '''not''' work with thumb, thumbnail or frame. (This works for external and internal links)-->*** '''!''' If you set <code>|link=|</code> (empty), then no <code>title</code> will be rendered. (See [https://bugzilla.wikimedia.org/show_bug.cgi?id=21454 bugzilla:21454].)* Other specific options:** '''alt='''''{| alternative text}'' — (MediaWiki 1.14+) Defines the alternative text (maps to the HTML attribute <code>alt="..."</code> of the generated <code>&lt;img /&gt;</code> element) of an image that will be rendered if either the referenced image cannot be downloaded and embedded, or if the support media must use the alternative description text (e.g. when using a Braille reader or with accessibility options set by the user in its browser).** '''page='''''{number}'' — Renders the specified page number (currently only applicable when showing a .djvu or .pdf file).** '''class='''''{Prettytablehtml class}'' — (MediaWiki 1.20+) Defines classes (maps to the HTML attribute <code>class="..."</code> of the generated <code>&lt;img /&gt;</code> element).** '''lang='''''{language code}'' — (MediaWiki 1.22+) For SVG files containing [http://www.w3.org/TR/SVG/struct.html#SwitchElement &lt;switch&gt;] statements varying on a ''systemLanguage'' attribute, selects what language to render the file in. The default is always English, even on non-English wikis. If a parameter does not match any of the other possibilities, it is assumed to be the caption text. Caption text shows below the image in '''thumb''' and '''frame''' formats, or as tooltip text in any other format. Caption text displayed in the '''thumb''' and '''frame''' formats may contain wiki links and other formatting. MediaWiki extensions can add additional options. If 'alt' is not specified and a caption is provided, the alternative text will be created automatically from the caption, stripped of formatting. === Format ===The following table shows the effect of all available formats. {|class="wikitable plainlinks"
|-
!Description!You type!You get{{Help:Images/frame|frame=|ex=no format specified|float=no|inline=yes|render caption=no}}{{Hl3Help:Images/frame|frame=border|ex='''border''' results in a very small gray border|float=no|inline=yes|render caption=no}}{{Help:Images/frame|frame=frameless|ex='''Descriptionframeless''', like thumbnail, respect user preferences for image width, but without border and no right float|float=no|inline=yes|render caption=no}}{{Help:Images/frame|frame=frameless|2=border|ex='''frameless''' and '''border'''|float=no|inline=yes|render caption=no}}{{Hl3Help:Images/frame|frame=frame|ex='''frame'''|float=yes|inline=no|render caption=yes}}{{Help:Images/frame|frame=thumb|ex='''You typethumb''' or '''thumbnail''' |float=yes|inline=no|render caption=yes}}|}When the height of an image in thumbnail is bigger than its width (i.e. in portrait orientation rather than landscape) and you find it too large, you may try the option <code>upright=N</code>, where N is the image's aspect ratio (its width divided by its height, defaulting to 0.75). The alternative is to specify the desired maximum height (in pixels) explicitly. Note that by writing <code>thumb={{Hl3}filename}</code>, you can use a different image for the thumbnail. === Size and frame ===Among different formats, the effect of the size parameter may be different, as shown below.* For how it appears when its size is not specified, see [[#Format|Format]] section above.* When the format is not specified, or only <code>border</code>ed, the size can be both reduced and enlarged to any specified size.* In the examples below, the original size of the image is 400 × 267 pixels.* An image with <code>frame</code> always '''You getignores'''the size specification, the original image will be reduced if it exceeds the maximum size defined in user preferences.* The size of an image with <code>thumb</code> can be reduced, but can not be enlarged beyond the original size of the image. {|class="wikitable"
|-
|Embed image<br /> (with alt text)! Format !! Reduced !! Enlarged|<code><nowiki>[[Image{{Help:Example.jpg|Mountain]]<Images/nowiki></code>size|frame=}}[[Image{{Help:Example.jpg|Mountain]]|-|Link to description pageImages/size|frame=border}}<code><nowiki>[[{{Help:Image:Example.jpg]]<Images/nowiki></code><br />size|frame=frame}}<code><nowiki>[[:Image{{Help:Example.jpg|Mountain]]<Images/nowiki></code>size|frame=thumb}}[[:Image{{Help:Example.jpg]]<br Images/>[[:Image:Example.jpgsize|Mountain]]frame=frameless}}|-}|Link directly to file|=== Horizontal alignment ===Note that when using the <code><nowiki>[[Media:Example.jpg]]</nowiki>frame</code><br />or <code><nowiki>thumb[[Media:Example.jpg|Mountain]nail]</nowikicode>formats, the default horizontal alignment will be </code>|[[Media:Example.jpg]]right<br /code>. [[Media:Example.jpg{|Mountain]]class="wikitable"
|-
!Description!You type!You get{{Help:Images/frame|Thumbnail<br /> (centered2=100px|frame=|ex='''no horizontal alignment specified''', 100 pixels<br or default alignment|inline=yes|float=no}}{{Help:Images/> wide, with caption)frame|2=100px|frame=none|ex=specify horizontal alignment as: '''none'''|inline=no|float=no}}<code><nowiki>[[Image{{Help:Example.jpgImages/frame|2=100px|frame=center|ex=specify horizontal alignment as: '''center'''|thumbinline=no|float=no}}{{Help:Images/frame|2=100px|Mountain]]</nowiki></code>frame=left|ex=specify horizontal alignment as: '''left'''|inline=no|float=yes}}[[Image{{Help:Example.jpgImages/frame|center2=100px|thumbframe=right|100pxex=specify horizontal alignment as: '''right'''|inline=no|Mountain]]float=yes}}
|}
==Using uploaded images= Vertical alignment ===To use The vertical alignment options take effect only if the image '''is''' rendered as an inline element and '''is not''' floating. They alter the way the inlined image will be vertically aligned with the text present in the same block before and/or other file which has been after this image on the same rendered row. Note that the rendered line of text where inline images are inserted (and the lines of text rendered after the current one) may be moved down (this will increase the line-height conditionally by additional line spacing, just as it may occur with spans of text with variable font sizes, or with superscripts and subscripts) to allow the image height to be fully displayed with this alignment constraint.<div class="mw-collapsible mw-collapsed"><div class="mw-collapsible-toggle toccolours" style="float:none;text-align:center">'''{{Blue|Toggle source code view}}'''</div><div class="mw-collapsible-content"><source lang="html4strict" enclose="div"><p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text</del>'''top:''' [[File:Example.jpg|20px|top]] [[File:Example.jpg|40px|top]] [[File:Example.jpg|100px|top]]<del>text</del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text</del>'''text-top:''' [[File:Example.jpg|20px|text-top]] [[File:Example.jpg|40px|text-top]] [[File:Example.jpg|100px|text-top]]<del>text</del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text</del><sup>super:</sup> [[File:Example.jpg|20px|super]] [[File:Example.jpg|40px|super]] [[File:Example.jpg|100px|super]]<del>text</del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text</del>'''baseline:''' [[File:Example.jpg|20px|baseline]] [[File:Example.jpg|40px|baseline]] [[File:Example.jpg|100px|baseline]]<del>text</del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text</del><sub>'''sub:'''</sub> [[File:Example.jpg|20px|sub]] [[File:Example.jpg|40px|sub]] [[File:Example.jpg|100px|sub]]<del>text</del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text</del>'''default:''' [[HelpFile:Managing filesExample.jpg|uploaded to the wiki20px]][[File:Example.jpg|40px]] [[File:Example.jpg|100px]]<del>text</del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text</del>'''middle:''' [[File:Example.jpg|20px|middle]] [[File:Example.jpg|40px|middle]] [[File:Example.jpg|100px|middle]], use<del>text</del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2">*<codespan style="background:#FFF;color:#000;text-decoration:overline"><u><nowikidel>text</del>'''text-bottom:''' [[File:Example.jpg|20px|text-bottom]] [[File:Example.jpg|40px|text-bottom]] [[ImageFile:Example.jpg|100px|text-bottom]]<del>text</del></u></span></nowikip> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text</codedel>If you add a pipe ('''bottom:'' [[File:Example.jpg|20px|bottom]] [[File:Example.jpg|40px|bottom]] [[File:Example.jpg|100px|) bottom]]<del>text</del></u></span></p></source></div></div> To show the alignment result more clearly, the text spans are overlined and some text after underlined, the filenamefont-size is increased to 200%, and the paragraph block is outlined with a thin border; additionally images of different sizes are aligned: <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text</del>'''top:''' [[File:Example.jpg|20px|top]] [[File:Example.jpg|40px|top]] [[File:Example.jpg|100px|top]]<del>text</del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text</del>'''text-top:''' [[File:Example.jpg|20px|text-top]] [[File:Example.jpg|40px|text-top]] [[File:Example.jpg|100px|text-top]]<del>text</del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text</del><sup>'''super:'''</sup> [[File:Example.jpg|20px|super]] [[File:Example.jpg|40px|super]] [[File:Example.jpg|100px|super]]<del>text</del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text</del>'''baseline:''' [[File:Example.jpg|20px|baseline]] [[File:Example.jpg|40px|baseline]] [[File:Example.jpg|100px|baseline]]<del>text</del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text</del><sub>'''sub:'''</sub> [[File:Example.jpg|20px|sub]] [[File:Example.jpg|40px|sub]] [[File:Example.jpg|100px|sub]]<del>text</del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text will be used as alternative </del>'''default:''' [[File:Example.jpg|20px]] [[File:Example.jpg|40px]] [[File:Example.jpg|100px]]<del>text for </del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-only browsersdecoration:overline"><u><del>text</del>'''middle:''' [[File:Example.jpg|20px|middle]] [[File:Example.jpg|40px|middle]] [[File:Example.jpg|100px|middle]]<del>text</del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2">*<codespan style="background:#FFF;color:#000;text-decoration:overline"><u><del>text<nowiki/del>'''text-bottom:''' [[ImageFile:Example.jpg|alternative 20px|text-bottom]][[File:Example.jpg|40px|text-bottom]] [[File:Example.jpg|100px|text-bottom]]<del>text</del></u></span></p> <p style="border:1px solid #AAA;padding:0;font-size:150%;line-height:2"><span style="background:#FFF;color:#000;text-decoration:overline"><u><del>text</del>'''bottom:''' [[File:Example.jpg|20px|bottom]] [[File:Example.jpg|40px|bottom]] [[File:Example.jpg|100px|bottom]]<del>text</nowikidel></codeu></span></p>
If you don't want Notes:# The "middle" vertical alignment position of the image (which is also the default) usually refers to display the middle between the x-height and the baseline of the text (on which the vertical middle of the imagewill be aligned, you can link and on which usually the text may be overstroke), but not to the middle of the line-height of the font-height that refers to the file's description pagespace between the "text-top" and "text-bottom" positions ; the font-height excludes:#* the additional line separation spacing normally divided equally into two line-margins (here 0.5em, by adding a colon:according to line-height set to 200%) above and below the font-height).#*<code><nowiki>[[:Image:Examplethe additional line spacing which may be added by superscripts and subscripts.jpg]]<# However, if the image height causes its top or bottom position to go above or below the normal full line-height of text, the middle position will be adjusted after the increasing the top and/nowiki></code>or bottom line-margins so that the image can fit and align properly, and all images (including those with smaller heights) will be vertically centered on the adjusted middle position (for computing the effective line-height, the text of each rendered row with the larger font-height will be considered).To bypass # The "text-top" and "text-bottom" alignment positions also excludes the extra line spacing added by superscripts and subscripts, but not the additional line-spacing defined by the description page line-height.# The "top" and link directly "bottom" alignment positions take into account all these extra line spacings (including superscripts and subscripts, if they are present in a rendered line span). When the image alignment constrains the image to a file grow above or below the normal line-spacing, and the image is not absolutely positioned, use the image will cause the "top" and "Mediabottom" pseudopositions to be adjusted (just like superscripts and subscripts), so the effective line-namespace: *<code><nowiki>[[Media:Exampleheight between rendered lines of text will be higher.jpg]]</nowiki></code>You can also make piped links if you want some other # The "underline", "overline" and "overstrike" text to -decoration positions should be somewhere within these two limits and ''may'' depend on the type and height of fonts used:*<code><nowiki>[[:Image:Example.jpg|link (the superscript and subscript styles may be taken into account in some browsers, but usually these styles are ignored and the position of these decorations may not be adjusted); so these decorations normally don't affect the vertical position of images, relatively to the text]]</nowiki></code>*<code><nowiki>[[Media:Example.jpg|link text]]</nowiki></code>
===Advanced optionsStopping the text flow ===The full syntax for displaying On occasion it is desirable to stop text (or other inline non-floating images) from flowing around a floating image. Depending on the web browser's screen resolution and such, text flow on the right side of an image is: <code>may cause a section header (for instance, <nowiki>[[Image:{name}|{options}]]== My Header ==</nowiki></code>Where options can be zero or more ) to appear to the right of the followingimage, instead of below it, separated as a user may expect. The text flow can be stopped by pipes:*placing '''<nowiki><codebr clear=all>thumb</codenowiki>''' (or if you prefer, <codenowiki>thumbnail</codediv style="clear: both">, or <code/div>frame</codenowiki>: Controls how ) before the text that should start below the floating image is formatted*. (This may also be done without an empty line by wrapping the section with the floating images with <codenowiki>left</codediv style="overflow: hidden">, <code/div>right</codenowiki>, which clears all floats inside the <code>centerdiv</code>element.) All images rendered as blocks (including non-floating '''center'''ed images, '''left'''- or '''right'''-floating images, <code>none</code>: Controls as well as '''framed''' or '''thumbnail'''ed floating images) are implicitly breaking the surrounding lines of text (terminating the alignment current block of text before the image on , and creating a new paragraph for the text after them). They will then stack vertically along their left or right alignment margin (or along the center line between these margins for '''center'''ed images). === Altering the pagedefault link target ===*<code>{width}px</code>: Resizes The following table shows how to alter the link target (whose default is the image description page) or how to remove it. Changing the link does not alter the given width format described in pixelsthe previous sections. {|class="wikitable plainlinks"|-!Description!You type!You get{{Help:Images/frame|2=link=Main Page|ex=internal link}}*<code>{caption text{Help:Images/frame|2=link=http://wikipedia.org/wiki/Test|ex=external link}}<{{Help:Images/code>frame|2=link=|ex=no link (external or file page)}}|} '''Warning:''': The options can be given in any orderlicencing requirements on your wiki may not allow you to remove all links to the description page that displays the required authors attributions, the copyrights statements, the applicable licencing terms, or a more complete description of the rendered image (including its history of modifications). : If you change or remove the target link of an image, you will then have to provide somewhere else on your page an explicit link to this description page, or to display the copyright and author statement and a given option does not match any of link to the other possibilitiesapplicable licence, it is assumed if they are different from the elements applicable to be the caption textembedding page itself. Caption text can contain : Your wiki links policy may restrict the use of the alternate link parameter, or may even enforce a prohibition of alternate link parameters for embedded media files (in which case, the link parameter will be ignored), or may only accept them after validation by authorized users or other formattingadministrators.
== Rendering a gallery of images ==
===Gallery of imagessyntax ===
It's easy to make a gallery of thumbnails with the <code><nowiki><gallery></nowiki></code> tag. The syntax is:
<pre>
<nowiki><gallery></nowiki>ImageFile:{filename}file_name.ext|{caption}|alt=alt languageImageFile:{filename}file_name.ext|{caption}|alt=alt language
{...}
</gallery>
</pre>
Captions are optional, and may contain wiki links or other formatting.
for Note that the image code is not enclosed in brackets when enclosed in gallery tags.  Captions are optional, and may contain wiki links or other formatting. Some of the parameters controlling thumb output can also be used here, specifically the ones that modify the file (as opposed to ones that control where in the page the image falls). For example, with multi-paged media like pdfs, you can use code like <code>page=4</code>. The <code>File:</code> prefix can be omitted. For example:
<pre>
<nowiki><gallery></nowiki>ImageFile:Example.jpg|Item 1ImageFile:Example.jpg|a link to <nowiki>[[Help:Contents]]</nowiki>ImageFile:Example.jpgImageFile:Example.jpg|alt=An example image. It has flowersImageFile:Example.jpg|<nowiki>''italic caption''</nowiki>File:Example.jpg|on page "<nowiki>{{PAGENAME}}</nowiki>"
</gallery>
</pre>
is formatted as:
<gallery>
ImageFile:Example.jpg|Item 1ImageFile:Example.jpg|a link to [[Help:Contents]]ImageFile:Example.jpgImageFile:Example.jpg|alt=An example image. It has flowersImageFile:Example.jpg|''italic caption''File:Example.jpg|on page "{{PAGENAME}}"</gallery> === Optional gallery attributes ===The gallery tag itself takes several additional parameters, specified as attribute name-value pairs: <pre><gallery {parameters}>{images}</gallery></pre> * <code>caption="{caption}"</code>: (caption text between double quotes for more than a word) sets a caption centered atop the gallery.* <code>widths={width}px</code>: sets the widths of the images, default 120px. ''Note the plural, width'''s'''''.* <code>heights={heights}px</code>: sets the (max) heights of the images.* <code>perrow={integer}</code>: sets the number of images per row. 0 means automatically adjust based on width of screen.* <code>showfilename={anything}</code>: Show the filenames of the images in the individual captions for each image (1.17+).* <code>mode={traditional|nolines|packed|packed-hover|packed-overlay}</code>: See section above (1.22+). NOTE: The widths and heights parameters are taken more as suggestions than strict values for packed (and related) modes. Packed modes will adjust the width of images in order to make each row the same length. Example: Coding:<pre><gallery widths=60px heights=60px perrow=7 caption="Mountains are groovy">File:Example.jpgFile:Example.jpgFile:Example.jpgFile:Example.jpgFile:Example.jpgFile:Example.jpgFile:Example.jpgFile:Example.jpgFile:Example.jpgFile:Example.jpg
</gallery>
</pre>
Result:
<gallery widths=60px heights=60px perrow=7 caption="Mountains are groovy">
File:Example.jpg
File:Example.jpg
File:Example.jpg
File:Example.jpg
File:Example.jpg
File:Example.jpg
File:Example.jpg
File:Example.jpg
File:Example.jpg
File:Example.jpg
</gallery>
==Related articles==
*[[Upload images|Uploading images]].
[[Category:Help|Images]]

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