in normal screen i am putting the test sales document for these two radio buttons is there.(one is yes and one is no),
in the out put both radio buttons are selecting. i need to select only one. but default its selected two radio buttons.
In the Screen Painter, highlight both radio buttons at the same time (using CNTL key).
From menu bar, choose: Edit > Grouping > Radio Button Group > Define.
Now they are "linked" to each other.
Don;t forget those points.