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Acrobat 9 Family of Products
Document Integrity and Preview Mode
Security Feature User Guide
PDF Signature Reports 128
Content preview mode cannot suppress
Documents that contain content or behaviors which are dynamic or invisible and which cannot be
suppressed in preview mode automatically invoke the PDF Signature Report dialog. For example, preview
mode cannot suppress (eliminate from the document or make static) externally referenced images,
multimedia content outside of the PDF file, and TrueType fonts. Such content is associated with a red X.
Users can highlight an error to see more detail (
Figure 91
). The signer should decide whether or not to
trust the document for signing. If you are not the author, contact the author for additional information.
Figure 91 PDF Signature Report: Content which cannot be suppressed in preview mode
Content preview mode can suppress
Preview mode can suppress certain types of dynamic content. When documents are signed in preview
mode, the signed view of the document (with the dynamic content suppressed) is saved so that signature
validators can use the View Signed Version feature to validate the signature and see what the signer saw
when they were signing.
The
View Report
button opens a dialog that lists discovered rich content. Suppressed content is
associated with a green check (
Figure 93
). If you are concerned about the presence of rich content even
though it is suppressed in preview mode, review the error codes and descriptions in the PDF Signature
Report dialog for more information.
Figure 92 Document Message Bar: Suppressible rich content