The ability to expand and collapse report sections makes it easy to analyze and understand the data being presented.

For example, a user can collapse a catalog report by clicking on the report header and see all the product categories at a glance. Then he can select the category he is interested in and click the category header section to drill-down and examine the individual products in that category.

Note that not all browsers support this capability. The most popular ones do, including Microsoft's Internet Explorer, Mozilla FireFox, and Opera 8. Some older browsers however, may not handle this at all, in which case the report will be shown completely expanded.

The default value for this property is True.