Adobe ACROBAT 3D Manual page 515

Using Clean Up settings
The settings in the Clean Up panel of the PDF Optimizer remove useless items from the document. These items
include elements that are obsolete or unnecessary to your intended use of the document. Be aware that removing
certain elements may seriously affect the functionality of the PDF document. By default, only elements that do not
affect functionality are selected. If you are unsure of the implications of removing other options, you should use the
default selections.
In the Clean Up area, you can select these options:
Object Compression Options apply as follows: If you choose Acrobat 4.0 And Later or Acrobat 5.0 And Later from
the Make Compatible With menu, you can choose to compress Document Structure or remove all compression in
the Object Compression menu. If you choose Acrobat 6.0 And Later or Acrobat 7.0 And Later, you can choose to
compress the entire file, compress Document Structure, remove all compression, or leave the compression
unchanged in the Object Compression menu.
Use Flate To Encode Streams That Are Not Encoded determines whether applying compression to a particular
stream reduces file size. Compression is applied only if file size will be reduced.
Remove Invalid Bookmarks/Links removes bookmarks and links that point to pages in the document that have
been deleted, or to other invalid destinations.
Remove 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
may not fit in some workflows.
Optimize The PDF For Fast Web View restructures an Adobe PDF document for page-at-a-time downloading
(byte-serving) from web servers. With page-at-a-time downloading, the web server sends only the requested page
of information to the user, rather than the entire PDF document. This is especially important with large documents
that can take a long time to download from a server.
Clean Up panel of PDF Optimizer