How to set single line space between Reports

Hi,

      How to set single line space between two reports.I am using jasper report 3.0 and my report is designed by iReport 2.0.2.In my report i export two jrxml  file into single xl sheet one by one.I want to set single space between to report.Is there any option to set space between two reports in single xl sheet.Please do needful.

Thanks,

Viji Hillary.