CHAPTER 8
618
Interactive Features
TABLE 8.21 Additional entries specific to markup annotations
KEY
TYPE
VALUE
T
text string
(Optional; PDF 1.1)
The text label to be displayed in the title bar of the annota-
tion’s pop-up window when open and active. By convention, this entry identifies
the user who added the annotation.
(Optional; PDF 1.3)
An indirect reference to a pop-up annotation for entering or
editing the text associated with this annotation.
(Optional; PDF 1.4)
The constant opacity value to be used in painting the anno-
tation (see Sections 7.1, “Overview of Transparency,” and 7.2.6, “Shape and
tion in its closed state (including its background and border) but not to the pop-
up window that appears when the annotation is opened.
The specified value is not used if the annotation has an appearance stream (see
specify any transparency. (However, if the viewer regenerates the annotation’s
appearance stream, it may incorporate the
CA
value into the stream’s content.)
The implicit blend mode (see Section 7.2.4, “Blend Mode”) is
Normal
. Default
value: 1.0.
Note:
If no explicit appearance stream is defined for the annotation, it is painted by
implementation-dependent means that do not necessarily conform to the Adobe
imaging model; in this case, the effect of this entry is implementation-dependent as
well.
Popup
dictionary
number
CA
RC
text string or
text stream
date
dictionary
(Optional; PDF 1.5)
A rich text string (see “Rich Text Strings” on page 680) to be
displayed in the pop-up window when the annotation is opened.
(Optional; PDF 1.5)
The date and time (Section 3.8.3, “Dates”) when the annota-
tion was created.
(Required if an
RT
entry is present, otherwise optional; PDF 1.5)
A reference to the
annotation that this annotation is “in reply to.” Both annotations must be on the
same page of the document. The relationship between the two annotations is
specified by the
RT
entry.
If this entry is present in an FDF file (see Section 8.6.6, “Forms Data Format”),
its type is not a dictionary but a text string containing the contents of the
NM
en-
try of the annotation being replied to, to allow for a situation where the annota-
tion being replied to is not in the same FDF file.
CreationDate
IRT