How do I stamp using a barcode font?

In order to stamp using a barcode font, you will need to use a FormInfo file. A FormInfo file contains information on the attributes in a PDF form field that will be applied to the fields in the output file. Here is a sample entry for a FormInfo file:

FieldName (Field1)
FontName (Enter the font name here)
FontFile (enter the complete path to the font here)
FontSize (enter optional font size. If omitted, the font information from the original PDF form field will be used)

Make sure there is (at least) one space between the parameter and the value above. Once you have your FormInfo file created, you would use the following command line syntax:

fdfmerge -p -f forminfofilename.txt -o outfile.pdf inputfile.pdf inputfdf.fdf