Adobe Acrobat 7 Professional - Manual (Page 633)

Verifying an Adobe PDF file against PDF/X criteria
PDF/X files can be created in a variety of ways, such as by using Acrobat Distiller. If you
open a PDF/X file created by Distiller or another application and start Preflight, the Verify
PDF/X icon at the bottom left of the Preflight dialog box indicates that you need to
verify that the file is PDF/X-compatible. This icon includes a question mark (?). The PDF/
X version used to create the file and the color settings file associated with the file appear
next to the icon.
You can verify a PDF file against PDF/X-3 or PDF/X-1a criteria before running a
preflight inspection.
To verify a PDF file against PDF/X criteria:
1. In the Preflight dialog box, click the Verify PDF/X icon . Preflight reports whether
the PDF file complies with the PDF/X standard used to create it. A green checkmark
appears in the PDF/X icon if the verification succeeds. A red checkmark appears in the
PDF/X icon if the verification fails.
2. After verification, view the results in the Results list, or click Report to see the results.