The printable version of each page (minus "special" pages such as Special:Login) is linked to from each page using links within the "Tools" menu by default, which is identifiable in CSS with #t-print. In most modern browsers (such as Internet Explorer 7, Firefox, and Opera 9), if a visitor selects the "print preview" option, the print stylesheet will be used by default.
Note
Some browsers may add page numbers and the URL of the printed page along with the header and footer of the printed document.
The way in which URLs (the addresses of pages) in MediaWiki are displayed depends on the way in which PHP is installed on your wiki's server. If PHP runs as an Apache module, the URLs are seen as wiki/index.php/Article_Title. If PHP runs as a CGI (Common Gateway Interface) module, the URLs will be seen as wiki/index.php?title=Article_Title.