The height of the listbox or dropdown used by survey item.
The value can be specified in percentages, pixels, or points.
The following displays the value of listheight in a text stimulus:
<text sometext>
/ items= ("listheight = <% listbox.q1.listheight %>")
</text>
The following displays the value of listheight in an instruction page:
<page somepage>
listheight = <% dropdown.q1.listheight %>
</page>