When you first navigate to a combination block, a summary window appears. You can select a record in the summary window and choose Summary/Detail from the Go menu to display the detail window for that record. This menu item, as well as the Summary/Detail toolbar button, lets you switch back and forth between the two windows which are always coordinated to show the same record.
You can also drill down from the summary window to the detail window for a record by clicking on the record's current record indicator. To return to the summary window, simply choose the Summary/Detail toolbar button or menu item. See: Current Record Indicator.