Board Thread:Support Requests - Getting Technical/@comment-3032314-20140102062302

Is there a technical manual or something for Category Galleries? I'd like to learn more about how images are chosen, but I'm only finding basic explanations like this:

Help:Category wrote:
 * Category Gallery
 * By default, all categories on Wikia have a Category Gallery at the top of the category page itself. This shows a small image and link for each of the 8 most popular pages in that category. The image shown is usually the first image on each page.
 * If a page has no graphics, then the first few lines of text will appear.
 * If you have a wiki where this display does not work well, you can add the magic word __NOCATEGORYGALLERY__  to the top of the page to remove it. You can also request that it be disabled on all pages through Special:Contact.

There's got to be more information than that!

...Right? 