How to default the Activity field based on offers(Setup Type) when we Create Offer in Oracle Applica

Hi,

When we create scan data offer,the Activity should default to 'Markdown' and when we create Accrual Offers, the Activity should default to 'Trade Promotion'. What is the easiest way to achieve this?

And also ,how to restrict defaulting the activity for all offers.

Any help is appreciated!.Thank you.

Thanks,

John.