initial pdf view with index side pane

Hi All,

Is there a switch I can throw to force the PDF that is generated to default to displaying the index as a (left-hand) side bar?

The best I could find from my searching was: http://wiki.apache.org/xmlgraphics-fop/ExtensionsForPdf but I am unsure how to interpret this page. Any help would be gratefully appreciated!

cheers,
Richard