The width of the image used by a image survey item.
<image>
The value can be specified in percentages, pixels, or points.
The following displays the value of imagewidth in a text stimulus:
<text sometext>
/ items= ("imagewidth = <% image.i1.imagewidth %>")
</text>
The following displays the value of imagewidth in an instruction page:
<page somepage>
imagewidth = <% image.i1.imagewidth %>
</page>