Set the Default Interactive Reporting Template
To change the default template for Interactive Reporting, edit the /pentaho-solutions/system/pentaho-interactive-reporting/settings.xml file and change the value of the <default-template> node. You do not have to provide a path to the template PRPT file -- just the filename.
<!-- default template --> <default-template>1_jade_1_left_aligned.prpt</default-template>