PDF/X-1 Checkup version 2.0 is an Acrobat plug-in that creates
PDF/X-1 files and thoroughly checks files for compliance with all
three conformance levels of the PDF/X-1 specification. If errors are
found, PDF/X Checkup displays easy to understand messages. Checkup
can also repair the PDF file to make it PDF/X-1 compliant.
New features in version 2.0 of PDF/X-1 Checkup include support for
the newly approved ISO-approved conformance levels, PDF/X-1a:2001 and
PDF/X-1:2001. Based on PDF 1.3, PDF/X-1a:2001 is designed for blind
exchange and requires all font and graphic data to be included in the
PDF file. PDF/X-1:2001 is designed for use when more cooperation is
possible and allows for OPI image substitution.
PDF/X-1 Checkup is used in conjunction with Adobe(tm) Distiller(tm)
to create PDF/X-1 compliant files from standard PDF files. The
PDF/X-1 file format was designed specifically for reliable
distribution of files for digital advertising and high quality
printing. For information on the PDF/X-1 standard, visit www.ddap.org.
Create PDF/X files from PDF.
Check PDF/X-1 files for compliance.
Repair non-compliant PDF/X-1 files.
Easy to understand error messages.
Simple to use Acrobat plug-in.
You can download more information in PDF form from here.
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.