In FBV0 transaction we have two editable fields in the document header list section where user can enter data and save.We need to confirm the entry data.But the confirm button is not functioning in the flavor as the button is in different window.

In screen persona FBVO transaction we have two editable fields in the document header list section where user can enter data and change it as required. For that we need to confirm the data which user put in those two particular field and then we have to save it. so there is two button we need i.e. confirm and save. The save button is work and function properly in the screen flavor. But  there is no function of the confirm button as it has no drag and drop option from main window to flavor window. I did scripting too for that also. But the issue is still there and I still could not find any proper solution for it. In the following attachment the entire scenario is given. The requirement is we have to function the confirm button of the pop up in the flavor.