Viewing And Comparing Changes And Versions; Viewing A List Of Post-Signing Modifications - Adobe 22002486 User Manual

Acrobat 9 Family of Products
Security Feature User Guide

7.5.2.2 Viewing and Comparing Changes and Versions

Document authors and recipients often need to know if a document has changed since it was signed.
Acrobat keeps track of a document's version number, stores previous document versions in their entirety,
and enables users to compare document versions by work and page. When you open a document, the
latest version is always displayed whether or not it is the signed version. Document recipients should
always remember the following:
Every time a document is signed, the entire document at the point of signing is stored in the PDF as an

incrementally numbered version.
A signature signs a document at a specific point in time; that is, signature X signs version X and

signature Y signs version Y. You can view exactly what the document looked like at that point in time
using View Signed Version.
For details, see the following:
Chapter 8, "Document Integrity and Preview

"Viewing a List of Post-Signing Modifications" on page

"Comparing a Signed Version to the Current Version" on page
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7.5.2.3 Viewing a List of Post-Signing Modifications

Because it is possible to change a document without changing its appearance, the list of post-signing
modifications is often a superset of what is visually displayed when comparing documents using
Document Compare. Therefore, a thorough analysis of a signed document's integrity includes viewing the
document modifications list.
To view a list of post-signing modifications, open the Signature pane and view the change history. All
changes are listed in chronological order.
Note that you can also do the following to get a more condensed list:
1. Right click on a signature and choose Show Signature Properties.
2. Choose the Document tab.
3. Choose Compute Modifications List. The list is capable of showing the following:
Fields (with field names) that have been created, modified, deleted, or filled in.
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Annotations (comments) that have been created, modified or deleted.
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Pages that were created, modified or deleted.
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Spawned pages, deleted spawned pages, and modified spawned pages.
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Attachments that have been added, deleted, or modified.
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Miscellaneous: Some changes which occur in memory or cannot be explicitly listed are labelled
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miscellaneous.
Troubleshooting a Document Integrity Problem
Mode".
122.
123.
Validating Signatures
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