Adobe InDesign CS4 - Manual (Page 517)

509 USING INDESIGN CS4
PDF
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.
Enable Copying Of Text, Images, And Other Content Lets users select and copy the contents of a PDF.
Enable Copying Of Content And Access For The Visually Impaired Lets visually impaired users use screen readers to
read and copy the document. This option is only available for low (40-bit RC4) encryption.
Enable Text Access For Screen Reader Devices For The Visually Impaired Lets visually impaired users read the
document with screen readers, but doesn’t allow users to copy or extract the document’s contents. This option is
available only for high (128-bit RC4 or AES) encryption.
Enable Plaintext Metadata Allows users to copy and extract content from the PDF. This option is only available when
Compatibility is set to Acrobat 6 (PDF 1.5) or later. Selecting this option allows storage/search systems and search
engines to access metadata stored in the document.
Font embedding and substitution
A font can be embedded only if it contains a setting by the font vendor that permits it to be embedded. Embedding
prevents font substitution when readers view or print the file, and ensures that readers see the text in its original font.
Embedding increases file size only slightly, unless the document uses CID fonts, a font format commonly used for
Asian languages. You can embed or substitute fonts in Acrobat or when you export an InDesign document to PDF.
You can embed the entire font, or just a subset of the characters used in the file. Subsetting ensures that your fonts and
font metrics are used at print time by creating a custom font name. That way, for example, your version of Adobe
Garamond®, not your service provider’s version, is always used by the service provider for viewing and printing. Type
1 and TrueType fonts can be embedded if they are included in the PostScript file, or are available in one of the font
locations that Distiller monitors and are not restricted from embedding.
When a font cannot be embedded due to the font vendor settings, and someone who opens or prints a PDF does not
have access to the original font, a Multiple Master typeface is temporarily substituted: AdobeSerifMM for a missing
serif font, and AdobeSansMM for a missing sans serif font.
The Multiple Master typeface can stretch or condense to fit, to ensure that line and page breaks in the original
document are maintained. The substitution cannot always match the shape of the original characters, however,
especially if the characters are unconventional ones, such as script typefaces.
Updated 18 June 2009