Divya,
Your observation is right. This can not be set to Display mode through OIAL setting. We may have to explore user-exit like QQMA0014 to prevent changes to the proposed values of this pop-up.
The reason why you can not achieve this through OIAL is the field names where you are expecting this Display effect are different. These belong to structure RIWO1. whereas you are setting the display setting to fields of VIQMEL. Hope you'll cross check the same.
KJogeswaraRao