SECTION 8.4
623
Anno ta tions
KEY
TYPE
VALUE
PA
dictionary
(Optional; PDF 1.3)
A URI action (see “URI Actions” on page 662) formerly
associated with this annotation. When Web Capture (Section 10.9, “Web Cap-
ture”) changes an annotation from a URI to a go-to action (“Go-To Actions”
on page 654), it uses this entry to save the data from the original URI action so
that it can be changed back in case the target page for the go-to action is subse-
quently deleted.
(Optional; PDF 1.6)
An array of 8
×
n
numbers specifying the coordinates of
n
quadrilaterals in default user space that comprise the region in which the link
should be activated. The coordinates for each quadrilateral are given in the order
x
1
y
1
x
2
y
2
x
3
y
3
x
4
y
4
specifying the four vertices of the quadrilateral in counterclockwise order. For
orientation purposes, such as when applying an underline border style, the
bottom of a quadrilateral is the line formed by (x
1
,
y
1
) and (x
2
,
y
2
).
If this entry is not present or the viewer application does not recognize it, the
region specified by the
Rect
entry should be used.
QuadPoints
should be ig-
nored if any coordinate in the array lies outside the region specified by
Rect
.
QuadPoints
array
Example 8.9 shows a link annotation that jumps to a destination elsewhere in the
document.
Example 8.9
93 0 obj
<< /Type /Annot
/Subtype /Link
/Rect [ 71 717 190 734 ]
/Border [ 16 16 1 ]
/Dest [ 3 0 R /FitR –4 399 199 533 ]
>>
endobj
Free Text Annotations
A
free text annotation (PDF 1.3)
displays text directly on the page. Unlike an ordi-
nary text annotation (see “Text Annotations” on page 621), a free text annotation
has no open or closed state; instead of being displayed in a pop-up window, the
text is always visible. Table 8.25 shows the annotation dictionary entries specific
to this type of annotation. “Variable Text” on page 677 describes the process of
using these entries to generate the appearance of the text in these annotations.
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