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