Help screen column header List Filter
From Joomla! Documentation
Filter by Partial Title or ID. In the upper left is a filter or search field and two buttons, as shown below.
- To filter by partial title, enter part of the title and click Search.
- To filter by ID number, enter "id:xx", where "xx" is the ID number (for example, "id:9").
- Click X to clear the Filter field and restore the list to its unfiltered state.