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ABBYY FineReader 12 User‘s Guide
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another application. Users will be able to perform all of these actions only after
entering the password specified by the author.
1.
Select the Restrict printing and editing the document and its security
settings option.
2.
Click the
button.
3.
In the Enter Permissions Password dialog box, enter your password and confirm
it.
The password you specified will be displayed as dots in the Permissions Password field
of the PDF Security Settings dialog box.
Next, select the actions you want to allow users to do with the PDF document. These
restrictions are set in the Permissions settings options group.
o
Items in the Printing allowed drop–down list let you allow or prohibit document
printing.
o
Items in the Changes allowed drop–down list let you allow or prohibit document
editing.
o
If the Allow copying text, pictures, and other content option is selected, the
user will be able to copy the contents of the PDF–document (text and images) to
the Clipboard. If you want to prohibit such actions, make sure this option is clear.
o
If the Allow screen readers to read text option is selected, the user will be able
to copy the contents of the PDF–document (text and images) to the Clipboard. If
you want to prohibit such actions, make sure this option is clear.
Encryption level
Items in the Encryption level drop–down list let you set the encoding type for the
password–protected PDF–document.
o
Low (40 bit) – compatible with Adobe Acrobat 3.0 and above sets a low 40–
bit encoding level based on the RC4 standard.
o
High (128 bit) – compatible with Adobe Acrobat 5.0 and above sets a high
128–bit encoding level based on the RC4 standard, but users of earlier Adobe
Acrobat versions will not be able to open PDF documents with this kind of
encryption.
o
High (128–bit AES) – compatible with Adobe Acrobat 7.0 and above sets a
high 128–bit encoding level based on the AES standard, but users of earlier Adobe
Acrobat versions will not be able to open PDF documents with this kind of
encryption.
Large archives of paper documents are difficult to organize and maintain, and it is often
practical to take data from these archives and store it digitally. Digital archives have many
advantages: documents are easier to access, searches take much less time, the archive
takes up less space, and documents do not deteriorate over time. Documents in digital
archives are often stored in the PDF/A format.
PDF/A is a version of the PDF format that omits several features, including encryption,
audio content, video content, and links to external sources. PDF/A files contain all of the
data necessary to render them in the same way on different platforms.
Note: DjVu is yet another document archiving format. It is commonly used to store
documents that contain many pictures, graphs, and formulas. See "Saving E–books" for
more on saving documents in DjVu.
