In 3.9.1 the field has arrows indicating that you should be able to see a list of the pre-existing tag labels but clicking on the arrows does nothing. If you start typing in the field matching values will display in a drop down.
The list of pre-existing labels should display when you click in the field or on the arrows as it does for other fields.
In 3.9.1 the field has arrows indicating that you should be able to see a list of the pre-existing tag labels but clicking on the arrows does nothing. If you start typing in the field matching values will display in a drop down.
The list of pre-existing labels should display when you click in the field or on the arrows as it does for other fields.