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Level 2

Hi i have following structure

Page1

subformparent - flowed layout

subformchild - position layout

textfield1

and a button called "add row". when i click on "add row" button textfield1 will be duplicate in flowed environment . lets say textfield1 is mandatory to filled. For example if we add three rows then all the three textfields are mandatory. Is this can do ? please tell me steps.