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