From the current view (Layout view), group this report by values in the Classification field.
a) Click on the 'Group By' option in the Classification field from the Layout view.
b) Access the 'Sort and Group' menu and select 'Classification' to group by its values in the Layout view.
c) Drag and drop the Classification field into the Grouping pane in the Layout view.
d) Use the 'Arrange' feature and select 'Classification' to arrange data based on its values in the Layout view.