Document attachments

Additional documents can be attached to the PDF by setting the pdf.attachment-file.N metadata value to the path of the file to be attached, where N is 1 for the first attachment, 2 for the second and so on. The numbering must be consecutive and start from 1; any break in the sequence will cause subsequent values to be ignored.

The optional metadata values pdf.attachment-description.N and pdf.attachment-name.N can be used to specify a description and name for the attachment.