You can import structured PDF documents
as artwork, which contains tags and structural information to provide
a defined tabbing and reading order for assistive technologies such
as keyboard access and screen readers.
The PDF Structure palette in Designer provides a view of the
hierarchical structure of a tagged PDF and displays three types
of structural tags:
- <content>
- Content tags apply to the content within the document. Content tags
are similar to HTML tags and are displayed as <P>, <H1>,
<Sect>, <Figure>, and so on. The content of the document
is displayed below these tags. Content tags are provided for reference
only and cannot be modified in Designer.
- <form>
- Form tags act as containers for field tags. All structure
for library objects is contained under the form tags.
- <field>
- Field tags correspond to the actual objects in the document.
Field tags can only exist under form tags. Each field tag can be
linked to a single object. When a field tag is linked to an object,
the tag displays the name of the object along with an icon indicating
the object type in the document. When a field tag is unlinked from
any object, the tag displays the words unlinked field.
When
you import a structured PDF document as artwork, Designer maintains
the structure and automatically associates any tagged Acrobat form
fields that are converted to library objects with the correct form
tags in the document structure. However, you may need to manually
add field tags under the correct form tags for any untagged fields
that remain in the form. You can also place additional library objects
on top of PDF artwork and add field tags to the document structure
for each object.
Using the PDF Structure palette, you can
see which objects are associated with the structure tags in the
form. When you click a content tag in the PDF Structure palette,
the corresponding object in the form is highlighted in the Design
View tab. For example, if you click a paragraph content tag <P>
displayed in the PDF Structure palette, the corresponding content,
usually text, is highlighted in the form.
After you import
a structured PDF document as artwork, you can use the commands on
the PDF Structure palette menu (and context menu) to add field tags
to and remove them from the document structure, navigate the structure, move
fields up and down in the structure, and show the content tags within
the structure.
Note: Keep in mind that you can
only edit the structure for fields in Designer. If you want to edit
the structure tags and content structure in a form, you must do
so in Acrobat.
Replacing PDF artwork affects document structureKeep in mind that
when you replace the background artwork in a structured PDF document,
the current structure is replaced with the structure in the new background
artwork. All content tags for the old artwork are replaced with
the content tags for the new artwork. The form and field tags remain
and are merged with the new content tags. Any content in the field
objects is preserved and merged with the new content structure.
You may need to move some of the form and field tags if the merged
tags are not in the intended locations.
Note that any form
fields that were added to the replacement PDF artwork in Acrobat
are not converted to the corresponding editable library objects
in Designer.
If the replacement PDF artwork is not structured,
the structure of the current PDF artwork is removed and the resulting
PDF form no longer has structure.
To add a field tag to the document structureYou can select a field object in a form
and then add a field tag under a selected form tag in the document
structure. You can add one field tag under each form tag.
You
can also create a field tag by dragging a field in the form onto
a structure tag in the PDF Structure palette.
In
the Design View tab, select the field in the form to add to the
document structure.
In the PDF Structure palette, right-click the form tag under
which to add the field tag and select Add Field to Structure.
To remove a field tag from the document structure In the PDF Structure palette, right-click
the field tag to delete and select Remove Field from Structure.
To move a field tag up or down in the document structure In the PDF Structure
palette, right-click field tag to move and select Move Field Up
or Move Field Down as needed.
To find untagged fields in the document structure Right-click in the PDF
Structure palette and select Find Untagged Fields.
To show the context tags in the document structure Right-click
in the PDF Structure palette and select Show Content tags.
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