Making Subtotals -Default -OO ALV report

Hi,

How do I make subtototals default? What is the parameter for this?

I am using OO ALV not FM's.

• Macro to populate the field catalog

DEFINE fieldcatalog.

t_fieldcat-ref_table = &1.

t_fieldcat-fieldname = &2.

t_fieldcat-coltext = &3.

t_fieldcat-do_sum = &4.

t_fieldcat-inttype = &5.

t_fieldcat-hotspot = &6.

append t_fieldcat.

clear t_fieldcat.

END-OF-DEFINITION.

Regards

Praveen