Drop-down Combination Boxes

Drop-down combination boxes combine a text entry field and a dropdown list of pre-defined values. Selecting one of the pre-defined values sets the entry field to that value.

Figure 6.18. A drop-down combination box before and after its dropdown list is displayed

Two images, one of a drop-down combination box entry field displaying its
          current selection, and the other showing its dropdown list of
          available choices when clicked on

Guidelines