Compatible with
Choose a PDF version or one of the PDF/A, PDF/X, and PDF/E standards to create files compatible with one of these PDF versions.
Selecting the PDF 1.4 (compatible with Adobe Acrobat® Reader version 5.0 or higher) option will create PDF 1.4 specific commands, such as “Transparency” and may result in higher quality and smaller file sizes.
Selecting the PDF 1.5 (compatible with Adobe Acrobat® Reader version 6.0 or higher) option will create PDF 1.5 specific commands, such as allowing you to use the more efficient JPEG2000 compression and 128-bit encryption.
Selecting PDF 1.6 will be compatible with Adobe Acrobat® Reader version 7.0.
Selecting PDF 1.7 will be compatible with Adobe Acrobat® Reader version 8.0.
For more details on PDF standards see About PDF Versions.