Requisition Lines Summary - how to populate the created_by_name_dsp column using personalization?

I am in the EBS Purchasing module, Requisition Lines Summary form, version 11.5.10.2.

There is a column called created_by_name_dsp, it is not a displayed column, but is available via Show Field.

This column doesn't bring in the Created By Name, even though the created_by field contains a user ID.

I am trying to use the Personalization feature to bring in the Created By Name, but it is not working.

The sql code i am using in the values is working.

But the trigger event, trigger object and trigger condition (if any) - is my problem. What trigger event/object do I use to launch the personalization so it fills in the Created By Name values for ALL lines at once?  Thank you, SA