to another page instead, or "link=no" to disable the link, or
"link=http://url" to link to a given url.
+The `pagenumber` parameter selects which of multiple images should be rendered;
+this is relevant mainly for GIF and PDF source images.
+
You can also set default values that will be applied to all later images on
the page, unless overridden. Useful when including many images on a page.