So far, you have been checking the report output in the BIRT Report Designer previewer. This time, you use the report viewer to see what the report looks like when it is deployed. The report viewer provides additional functionality, including the capability to navigate to specific sections of a report using a table of contents. When you create groups in a report, BIRT automatically generates a table of contents, using the group values to show the hierarchy of the report.
Choose Run→View Report→In Web Viewer. The report appears in the report viewer.