Adobe Acrobat 8 3D - Manual (Page 504)

497 ADOBE ACROBAT 3D VERSION 8
User Guide
author’s name, and copyright information. If you select Include Advanced Fields, you can include the fields and
structures used for storing the metadata using namespaces and properties. This advanced information appears as a
text-based tree view of all the XMP data in the PDF, both for the document as well as for those images in the PDF
for which XMP metadata is present.
Note: You can also view the metadata for the PDF document as a whole in the Document Properties dialog box. Choose
File > Properties, click the Description tab, and then click Additional Metadata. To see the advanced fields, click
Advanced from the list on the left.
3 (Optional) Save the report.
Advanced inspections
Viewing preflight problems inside the PDF structure
If you have advanced knowledge of the PDF file format, you may want to explore the technical reasons for a preflight
mismatch by examining the internal structure of the PDF and its fonts. Preflight includes three options for in-depth
inspection of a PDF. Technically skilled users can use these tools to analyze the objects and fonts that caused a
mismatch.
For detailed information on PDF structure, refer to PDF Reference Fifth Edition: Adobe Portable Document Format
Version 1.6 (English only) on the Adobe website. You should also have intimate knowledge of font internal structures,
or have font specifications for Type 1, TrueType, and OpenType fonts at hand. The font specifications are listed in
the bibliography of the guide.
Note: You can navigate the PDF and fonts in the windows that appear, but you can’t edit the PDF structure or fonts.
Browse the internal PDF structure
View the structure of a PDF, as defined by content streams and cos objects, in a tree array. (Content streams represent
pages, form XObjects, Type 3 font characters, and the appearance of comments and form fields. Cos objects include
such items as color space, images, and XObjects.)
Check PDF syntax, view the results of a fixup, or determine the cause of a mismatch. Choose between five view
modes that organize content streams in different ways. You cannot edit the PDF in the Internal PDF Structure
window.
Note: Do not confuse the internal structure with the logical structure in tagged PDFs that improves accessibility for low-
or non-sighted readers. The internal structure is a superset of all objects in the document, including tags.
Before you can browse the internal PDF structure, you must run a preflight check.
1 In the Preflight window, choose Browse Internal Structure from the Options menu.
The Internal PDF Structure window opens, showing a tree view of the document information and the document
catalog (the root of the document’s object hierarchy).
2 Expand each tree item to view the document structure.
3 Click the Page button to view the structure of each page.
4 To change how content streams appear in the tree view, select a view mode in the toolbar:
Classic Displays the content stream as a sequence of page content operators. Expand the subtree for an operator
to view its operands. This is the default view.