http://www.mediawiki.org/wiki/Manual:FAQ#How_do_I_customize_the_logo_in_ the_top_left_corner.3F_Can_I.3F Peter Blaise responds: Actually, that was just one example. The total question was "how do I know where to find the name of the part, then control anything on a MediaWiki screen?" We just lucked out that what I called a log was also called a logo by the MediaWiki community. What are the names of the other on-screen parts. Especially the one that have on-screen names but I've found are not actually called that (like discussion = talk)? A search at MediaWiki.org for [change the logo] actually brings up a more precise response form none other than our own esteemed Rob Church: http://www.mediawiki.org/wiki/User:Robchurch/FAQ_redesign/Change_the_log o What did I do? I simply browsed my \mediawiki\ directory looking for pictures, found one that looked the same, right-clicked it and asked for properties, then copied my own image to the same dimensions over the same file name. Plan B. For MediaWiki v1.10, it's in \mediawiki\skins\common\images\ and the two file I copied over are "wiki.png" 135 x 135 pixels and "poweredby_mediawiki_88x31.png" which is, of course, 88 x 31 pixels. Larger images work, also. Try them and adjust to taste. By the way, I replaced "Powered by MediaWiki" with "Powered by Win/Apache/MySQL/PHP/MediaWiki/USTrademarks" (because I'm inside the US Trademark office). Anyway ... The fact that your link brings more than 400 additional words to expand the [change the logo] subject, and hardly duplicates much from Rob's 94 words on the subject is a clue, a reminder of the old adage: The simpler the question, the more complex the answer; the more complex the question, the simpler the answer! Nevertheless, thanks for the link. It also reminds me that building a MediaWiki gazetteer and unambiguously structured encyclopedia is not easy. Simple? Yes. Easy? No. Now, aside form my Plan B above, how would we find on MediaWiki.Org how to change the "powered by..." image and link, and what does anyone call it? And so on for every piece and part in view on any MediaWiki screen! -- Peter Blaise