Chunk:Help screen column header Checkbox
From Joomla! Documentation
- Checkbox. Check this box to select one or more items. You can also check the box in the column heading to select all items. After one or more boxes are checked, click a toolbar button to take an action on the selected item or items. Many toolbar actions, such as Publish and Unpublish, can apply to multiple items. Others, such as Edit, only work on one item at a time. If multiple items are checked and you press Edit, the first item will be opened for editing.