Chunk30:Help screen column header Alt text From Joomla! Documentation Revision as of 00:00, 14 October 2013 by Dextercowley (talk | contribs) (alt text)(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff) Alt text. Alternative text to use for visitors who don't have access to images. This text is replaced with the caption text if caption text is available.