The height of the back and forward buttons on a survey page.
<survey> <surveypage>
The amount can be specified in percentages, pixels, or points.
The following displays the value of navigationbuttonheight in a text stimulus:
<text sometext>
/ items= ("navigationbuttonheight = <% surveypage.page3.navigationbuttonheight %>")
</text>
The following displays the value of navigationbuttonheight in an instruction page:
<page somepage>
navigationbuttonheight = <% survey.mysurvey.navigationbuttonheight %>
</page>