Previous versions support PDF formats up to PDF 1.6 and PDF/X-3. With Version 9 you can also create documents in the formats PDF 1.7 and PDF 2.0. Furthermore, Version 9 supports the PDF/X-4, PDF/X-4p and even the PDF/X-5g and PDF/X-5pg formats. The user interface for the creation of PDF/X files has been improved from the bottom up, so that even beginners should be able to create correct PDF/X documents. Version 9 also supports PDF layers.