At the end, the goal is to have a nice document with all the data transformed according to the report design.
To export rptdocument (the report document), navigate to Run | Generate Document. This way, you will be able to use this in other frameworks compatible with BIRT, such as a report server. For details check the BIRT integration guide:
http://www.eclipse.org/birt/phoenix/deploy/
When you want to export the report in a more static format, you should select one of the options in Run | View Report, or use the icon that resembles "Earth" from the icon's menu to access the same options. The default installation has the following options to export the document: Web Viewer (it is an interactive local or remote report viewer), doc, HTML, odp, ods, odt, pdf, postscript, ppt, and xls.
Note
The ppt support is not ideal; visit the following link for more information:https://bugs.eclipse.org/bugs/show_bug.cgi?id=328982
When you either generate or just view the report, you will be prompted for the report parameters. You can specify them in the URL. For further details, please refer to http://www.eclipse.org/birt/phoenix/deploy/viewerUsage.php#parameters.
Different emitters have different capabilities, so it worth testing all the export options you want to support on a sample data.
Similar to many other parts of BIRT and KNIME, there are additional extensions for exports too; search for them with the BIRT emitter search expression.