Adobe InDesign CS3 Manual do Utilizador descarregar pdf (Página 492)

INDESIGN CS3

User Guide

485

Security options for PDFs

YoucansetthefollowingoptionswhenyoucreateaPDForwhenyouapplypasswordprotectiontoaPDF.Options

vary depending on the Compatibility setting. Security options are not available for PDF/X standards or presets.

Compatibility Sets the type of encryption for opening a password-protected document. The Acrobat 4 (PDF 1.3)

option uses a low encryption level (40-bit RC4), while the other options use a high encryption level (128-bit RC4 or

AES).

BeawarethatanyoneusinganearlierversionofAcrobatcannotopenaPDFdocumentwithahighercompatibility

setting. For example, if you select the Acrobat 7 (PDF 1.6) option, the document cannot be opened in Acrobat 6.0 or

earlier.

Require A Password To Open The Document Select this option to require users to type the password you specify to

open the document.

Document Open Password Specify the password that users must type to open the PDF file.

Note: If you forget a password, there is no way to recover it from the document. It’s a good idea to store passwords in a

separate secure location in case you forget them.

Use A Password To Restrict Printing, Editing And Other Tasks Restricts access to the PDF file’s securitysettings. If the

file is opened in Adobe Acrobat, the user can view the file but must enter the specified Permissions password in order

to change the file’s Security and Permissions settings. If the file is opened in Illustrator, Adobe Photoshop, or Adobe

InDesign, the user must enter the Permissions password, since it is not possible to open the file in a view-only mode.

Permissions Password Specify a password that is required to change the permissions settings. This option is

available on if the previous option is selected.

Printing Allowed Specifies the level of printing that users are allowed for the PDF document.

• None Prevents users from printing the document.

• Low Resolution (150 dpi) Lets users print at no higher than 150-dpi resolution. Printing may be slower because

each page is printed as a bitmap image. This option is available only if the Compatibility option is set to Acrobat 5

(PDF 1.4) or later.

• High Resolution Lets users print at any resolution, directing high-quality vector output to Adobe PostScript and

other printers that support advanced high-quality printing features.

Changes Allowed Defines which editing actions are allowed in the PDF document.

• None Prevents users from making any changes to the document that are listed in the Changes Allowed menu,

such as filling in form fields and adding comments.

• Inserting, Deleting, And Rotating Pages Lets users insert, delete, and rotate pages, and create bookmarks and

thumbnails. This option is only available for high (128-bit RC4 or AES) encryption.

• Filling In Form Fields And Signing Lets users fill in forms and add digital signatures. This option doesn’t allow

them to add comments or create form fields. This option is only available for high (128-bit RC4 or AES) encryption.

• Commenting, Filling In Form Fields, And Signing Lets users add comments and digital signatures, and fill in

forms. This option doesn’t allow users to move page objects or create form fields.

• Page Layout, Filling in Form Fields, and Signing Lets users insert, rotate, or delete pages and create bookmarks or

thumbnail images, fill out forms, and add digital signatures. This option doesn’t allow them to create form fields. This

option is only available for low (40-bit RC4) encryption.

• Any Except Extracting Pages Lets users edit the document, create and fill in form fields, and add comments and

digital signatures.

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