Blue Beam signature. Bidirectional Blue Beam: A New Method for Digital Publishing of Print-Ready and PDF Document With this method, you can build digital files using print-ready documents: such as Microsoft Word format, PDF or Adobe PDF format. For example, a PDF with a Word document will be signed and delivered to your PC like a real printed document. In this case, every other printer in your network will recognize the print document as being produced by Adobe and will print the PDF right away. The same PDF can then be imported from the print server of several other clients via FTP, and printed. In this way, all the print-ready PDFs in your office work with your corporate network and can be used for internal, external distribution.