There is a new option in Grouping: The 'Page Break' option.
When checked, the report is separated into pages based on the grouping value in the report.
Without a page break, the example report will look like this:
Using the option setting shown in the Grouping window above will break the report into pages based on the value of the Manufacturer field:
Page Break Selection
Choosing a page break on a field automatically selects any other grouping fields that may exist above it. This is just a visual cue to indicate that it is the combination of values (manufacturer + sales account in the example below) that determines when a page break occurs.