You need to set the fields that you want to have the same data, once
entered, to global. Global means that any change in any field with the
same name will effect all fields similarly across the document.You need
to set this by opening the Object menu and go to the binding Tab. Set
the "Default Binding (Open, Save, Submit):" to Global. Note the name of
the Field. Now if you create a new field and give it the same name, all
data entered in that field will be the same across the document.Hope
that ...