Adobe Acrobat XI - Manual (Page 209)

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Editing PDFs
Last updated 1/14/2015
Detect And Merge Image Fragments Looks for images or masks that are fragmented into thin slices and tries to merge
the slices into a single image or mask.
Discard Embedded Print Settings Removes embedded print settings, such as page scaling and duplex mode, from the
document.
Discard Embedded Search Index Removes embedded search indexes, which reduces file size.
Discard Bookmarks Removes all bookmarks from the document.
Discard User Data panel
Use the Discard User Data panel to remove any personal information that you don’t want to distribute or share with
others. If you’re unable to find personal information, it may be hidden. You can locate hidden text and user-related
information by using the Examine Document command (Tools > Protection >Remove Hidden Information). Discard
All Comments,Forms And Multimedia
Removes all comments, forms, form fields, and multimedia from the
PDF.Discard Document Information And MetadataRemoves information in the document information dictionary
and all metadata streams. (Use the Save As command to restore metadata streams to a copy of the PDF.)Discard All
Object Data
Removes all objects from the PDF.Discard File AttachmentsRemoves all file attachments, including
attachments added to the PDF as comments. (PDF Optimizer doesn’t optimize attached files.)Discard External Cross
References
Removes links to other documents. Links that jump to other locations within the PDF are not
removed.Discard Private Data Of Other ApplicationsStrips information from a PDF document that is useful only to
the application that created the document. This does not affect the functionality of the PDF, but it does decrease the file
size.Discard Hidden Layer Content And Flatten Visible LayersDecreases file size. The optimized document looks
like the original PDF but doesn’t contain layer information.
Clean Up panel
The options in the Clean Up panel of the PDF Optimizer remove useless items from the document. These items include
elements that are obsolete or unnecessary for your intended use of the document. Removing certain elements can
seriously affect the functionality of the PDF. By default, only elements that do not affect functionality are selected. If
you are unsure of the implications of removing other options, use the default selections.
Object Compression Options Specifies how to apply Flate compression in the file.
Use Flate To Encode Streams That Are Not Encoded Applies Flate compression to all streams that aren’t encoded.
In Streams That Use LZW Encoding, Use Flate Instead Applies Flate compression to all content streams and images that
use LZW encoding.
Discard Invalid Bookmarks Removes bookmarks that point to pages in the document that have been deleted.
Discard Invalid Links Removes links that jump to invalid destinations.
Discard Unreferenced Named Destinations Removes named destinations that are not being referenced internally from
within the PDF document. Because this option does not check for links from other PDF files or websites, it does not fit
in some workflows.
Optimize Page Content Converts all end-of-line characters to space characters, which improves Flate compression.
Optimize The PDF For Fast Web View Restructures a PDF document for page-at-a-time downloading (byte-serving)
from web servers.
Enable Fast Web View in a PDF
Fast Web View restructures a PDF document for page-at-a-time downloading (byte-serving) from web servers. With
Fast Web View, the web server sends only the requested page, rather than the entire PDF. This option is especially
important with large documents that can take a long time to download from a server.