With A-PDF Filler http://www.a-pdf.com/filler/index.htm, you are allowed to define the filler field type such as text, image, rectangle, line, arrow, ellipse and their position, color, alignment, size attributes conveniently. See more at: http://a-pdf.com/faq/how-to-batch-fill-scanned-pdf-forms-by-using-a-pdf-filler.htm
