Chunk30:Help screen Column Header Checkbox From Joomla! Documentation Revision as of 04:30, 14 June 2022 by Franz.wohlkoenig (talk | contribs)(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff) Other languages:Deutsch English português do Brasil Checkbox. Check this box to select one or more items. To select all items, check the box in the column heading.Note: Many toolbar actions can work with multiple items.