Listboxes display a column of available choices.
There are different kinds of listboxes with additional navigation conventions:
Drop-down listboxes by default show only the selected item. A small button to the right of the control shows a downward-pointing arrow. Select the arrow to display more items from the listbox. If there are more choices than can fit in the preset listbox area, a slider appears along the side of the listbox. Show or hide the list using F4. Enter selects or deselects an item.
Extended selection listboxes support selecting single items, blocks of items, or combinations of the two. After selecting an item, hold down Shift+ or Ctrl+navigation keys to select or deselect additional items or blocks of items.