When you create a report with group breaks, you can display the HTML report output in an "expanded" format that includes the detail records for each group, or in a "collapsed" format that hides each detail record.
When you select this option, the HTML report output initially displays in a “collapsed” format. To expand the detail for an item the report, click the icon next to the item.
For example, in a report that groups information by customer, you could click the icon next to a customer name to display the detail records for that customer.
As you work with group breaks using the expand/collapse feature, keep in mind the following:
You can nest levels of group breaks—When you collapse a high-level group break, all lower-level group breaks are hidden.
You can expand or collapse any group break—Any group break can be used to create an expanded or collapsed region in a report.
Expanded or collapsed group breaks do not need to be consecutive—Group breaks can skip levels. For example, you could collapse group breaks at levels one and three, and expand the group break at level two.
Lower-level group breaks maintain their state when collapsed—When a higher-level group break is collapsed and later expanded, lower-level group breaks that were collapsed remain collapsed, and lower-level group breaks that were expanded remain expanded.