Help needed on Smart Forms

Dear all,

I have got a problem in smartforms, I have to modify a label in smartform and the problem iam facing is i see no text or globa data or system fields in some of the nodes, but the print preview of the smartform is displaying some texts and barcodes. i have debugged the form and found that a table textbuffer is holding all these texts and feilds. can any one explain me in detail how to input these texts and feilds.

thanks