A combo box consists of an input field and a dropdown list box. You can use a combo box to either enter data directly or select an item from the dropdown list. The dropdown list box is not editable. You can use it to select an item from a list of items.
Dropdown boxes and combo boxes support sequential element navigation. This allows you to move the focus forwards to a box using [Tab] or backwards using [Shift]+[Tab]. If an underlying function exists, you can start it by pressing [F2] – this corresponds to a double click with the left mouse button.
For more information, go to Input Field.
To call up the value list in a combo box or a dropdown list box, choose [Alt]+[Down]. Then use the up and down arrow keys to navigate to your target value and select it with [Enter]. To go to the end or the beginning of the dropdown list, choose [End] or [Home]. You can also use [PageUp] and [PageDown] to move the focus through a list with many entries in larger steps.
Alternatively, you can navigate between the value list entries without opening the value list explicitly. By choosing [Right] or [Left] when the dropdown list box has the focus, you can call up the value list entries one by one.
If the text cursor is on the first item in a combo box, you can use [Backspace] to call up a history list. From this list you can select one of the entries used before.
When you enter the first characters in a combo box, the auto completion function automatically selects the most suitable item in a list and displays this item in the field. The characters you have entered remain deselected.
There are several ways to exit a dropdown list box:
● To select the focused list option in a dropdown list and go to the next user interface element, choose [Tab].
To accept the change and close the dropdown list without moving the focus to the next user interface element, choose [Enter].
● To close the dropdown list without selecting the focused list option, choose [Escape] or [Alt]+[Up] or [Alt]+[Down].