public PdfFormField addSignature(String name, 
                    float llx, float lly, float urx, float ury) {
        PdfFormField signature = PdfFormField.createSignature(writer);
        setSignatureParams(signature, name, llx, lly, urx, ury);
        drawSignatureAppearences(signature, llx, lly, urx, ury);
        addFormField(signature);
        return signature;
    }
public PdfFormField addSignature ( String name , float llx , float lly , float urx , float ury ) { PdfFormField signature = PdfFormField . createSignature ( writer ) ; setSignatureParams ( signature , name , llx , lly , urx , ury ) ; drawSignatureAppearences ( signature , llx , lly , urx , ury ) ; addFormField ( signature ) ; return signature ; }
@param name
@param llx
@param lly
@param urx
@param ury
@return a PdfFormField