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Specifying a size does not just change the apparent image size using HTML; it actually generates a resized version of the image on the fly and links to it appropriately. This happens whether or not you specify the size in conjunction with "thumb". This means the server does all the work of changing the image size, not the web browser of the user.
This can be awkward if the image is quite large, for the full size image will be displayed when the user clicks the link. Finally, you can link to one image from a thumbnail's small double-rectangle icon , but display another image using "|thumb=Displayed image name". This is intended for the rare cases when the Wikipedia software that reduces ...
Image using width upright=1.8, so that it is 80% wider than the Siberian Husky image above (which is at the default upright=1 width) Image using upright=0.5; a scaling factor less than 1 contracts the image width. An image's size is controlled by changing its width – after which software automatically adjusts height in proportion.
Prior to MediaWiki 1.17, the default was 4. The default width and height are currently 120px. Images displayed by the <Gallery>...</Gallery> tag do not obey user viewing preferences. The packed mode will automatically adjust image sizes to use available display space optimally. Every line specifies an image file.
The available values for thumbnail size in Preferences (on the Appearance tab) are 120px, 150px, 180px, 200px, 220px (default), 250px, 300px, and 400px. As explained at Wikipedia:Extended image syntax § Size, upright=Factor will "adjust a thumbnail's size to Factor times the default thumbnail size, rounding the result to the nearest multiple of 10".
For magnifying computer graphics with low resolution and few colors (usually from 2 to 256 colors), better results will be achieved by pixel art scaling algorithms such as hqx or xbr. These produce sharp edges and maintain high level of detail. Unfortunately due to the standardized size of 218x80 pixels, the "Wiki" image cannot use HQ4x or ...
This is the syntax used by { { Infobox football club }}, { { Infobox military conflict }} and others. Here are the image parameters for { { Infobox football club }} : image is a complete image placement specification as described in the Picture tutorial or at Wikipedia:Extended image syntax. The size should typically be set to 200px, and the ...
button, which will bring up your operating system's standard file open dialog. Choosing a file will fill the name of that file into the text field next to the button. You must also check the box affirming that you are not violating any copyrights by uploading the file. Press the "Upload" button to finish the upload.