Order Quantity and Target Quantity in Overview screen

Hi All Expert,

I want to create Sales Order with Standard and Service item together in one Sales Order using t-code VA01,

I 've config. the Item category group to enable both service and standard item.

In operation, the user want to input the service item qty (Target qty) and standard item qty in the same overview screen.

However the Screen Sequence Group in the Sales Document type is AU (Sales Order), so user cannot input the Target qty in the Order qty field, they must highlight the item line and select the detail Sales A view to input the Target Qty.

Is it possible to enable the Target Qty and Order Qty in the same overview screen?

or any config. can help?

even Userexit is welcome!

Thanks.

Terry