Wikipedia: The Missing Manual

Files

The two options here control how Wikipedia displays separate image files.

• Limit images on image description pages. This option affects you only if you go to the page that stores an image (a page like Image:Picture used in the article.jpg). Such pages are where you get more details about a picture—copyright, where it came from, upload date, and so on. If you have a very small screen and want to look at an image page (just click on the image), you may need to adjust this setting down from the initial setting of 800 by 600 pixels. Similarly, you may want to reduce image size if you have a very slow connection.

  Note

  You don’t need to change this setting to see images larger than the setting; it simply controls what you see initially when you arrive at an image page. When you’re there, clicking on an image that has a higher resolution shows that image in the higher resolution.

• Thumbnail size. As mentioned on ???, if you’ve got a particularly big or particularly small screen, you can tell Wikipedia how you want to see thumbnails displayed on your screen: Select from one of the six sizes (120px to 300px). After you click Save, you see all thumbnailed pictures in Wikipedia in that size.