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ADOBE ACROBAT 8 STANDARD
User Guide
If the PDF already has security applied, you may need to supply the Permissions password that lets you change
security settings.
See also
“Set passwords for PDFs” on page 209
Prevent changes to a PDF
Add security restrictions to help prevent others from changing your PDF.
1
Click Secure
on the Tasks toolbar, and choose Password Encryption.
2
Select Restrict Editing And Printing Of The Document, and type a Permissions password.
3
Choose an option from the Changes Allowed menu.
For information on using other security methods to restrict access, see Help.
See also
“Set passwords for PDFs” on page 209
Create secure attachments
You can add security to both PDF and non-PDF documents by embedding them in an encrypted envelope, called a
security envelope
, that you can send as an email attachment.
1
Click Secure
on the Tasks toolbar, and choose Create Security Envelope.
2
Click Add File To Send, and select the desired documents.
3
Click Next, and follow the on-screen instructions to create the security envelope.
Recipients can extract and save the encrypted documents. Once saved, the documents are no longer encrypted.
See also
“Create secure attachments” on page 213
Opening restricted documents
Open secured PDFs
If you receive a PDF that is protected by security features, you may need a password to open the document. Some
protected documents have restrictions that prevent you from printing, editing, or copying content in the document.
If a document has restricted features, any tools and menu items related to those features are dimmed.
❖
If a document is restricted or has a special status, the Security Settings button
or the Signatures button
appear to the left of the document window. Click the button to discover the protection settings and determine which
features are restricted.
If you have trouble opening a PDF, or if you’re restricted from using certain features, contact the author of the PDF.