First-Letter Cursor Navigation

Provide first-letter cursor navigation in a selection scope only if the selection scope does not support a keystroke-based mechanism such as mnemonic navigation.

Provide first-letter cursor navigation in all selection scopes that associate textual labels with each selectable item.

Skip white spaces that begin a textual label to determine the first character of a textual label used to match an item.

If the current language environment supports characters with multiple cases, such as uppercase and lowercase, allow the user to press letters of any case to match a specific textual label.

If the current language environment supports characters with multiple cases, such as uppercase and lowercase, allow the user to press letters of any case to match a specific textual label.

When a user types a printing character in a scope by using first-letter cursor navigation, move the location cursor in the scope to the next item whose textual label starts with that letter.

When a user enters a printing character that has no valid match, do not move the location cursor in the selection scope.

When a printing character entered into a text-display field that has focus is used for first-letter cursor navigation of an associated list, select the item matched and place its text contents into the text-display field. If there is no valid match, generate a warning signal and do not make any changes to the appearance of the list or text-display field.

When a printing character entered into a text-display field that has focus is used for first-letter cursor navigation of an associated list, and the list is not displayed, do one of the following:

When focus is in a text-display field that supports first-letter cursor navigation of an associated list, pressing Ctrl ↓ and Ctrl ↑, respectively, moves the cursor, selects the next or previous matching item that matches the prefix, and places its text contents into the text-display field.