If the report is printing in portrait mode, it can be change to landscape mode by using the button in the report viewer control bar. It also may be possible to use a larger paper size in the printer.
The report can be printed across several pages. In the Advanced section of the report window use the Report Width in Pages option This makes it possible to create reports that are several pages wide. After printing such a report, you might tape the pages together to get a single very wide report.