Adobe Acrobat 8 3D - Manual (Page 353)

346 ADOBE ACROBAT 3D VERSION 8
User Guide
Discard All Alternate Images Removes all versions of an image except the one destined for on-screen viewing. Some
PDFs include multiple versions of the same image for different purposes, such as low-resolution on-screen viewing
and high-resolution printing.
Discard Embedded Page Thumbnails Removes embedded page thumbnails. This is useful for large documents,
which can take a long time to draw page thumbnails after you click the Pages button.
Discard Document Tags Removes tags from the document, which also removes the accessibility and reflow capabil­
ities for the text.
Convert Smooth Lines To Curves Reduces the number of control points used to build curves in CAD drawings,
which results in smaller PDF files and faster on-screen rendering.
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 from the Document menu.
Discard All Comments, Forms, And Multimedia Removes all comments, forms, and multimedia from the PDF.
Discard Document Information And Metadata Removes 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 Attachments Removes 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 Applications Strips information from a PDF document that is useful only to the appli­
cation 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 Layers Decreases 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 to your intended use of the document. Be aware that removing
certain elements may 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, you should use the default
selections.
In the Clean Up area, you can select these options:
Use Flate To Encode Streams That Are Not Encoded Applies Flate compression to all streams that aren’t encoded.