CHAPTER 8
616
Interactive Features
ANNOTATION TYPE DESCRIPTION
MARKUP? DISCUSSED IN SECTION
Highlight
Underline
Squiggly
(PDF 1.3)
Highlight annotation
(PDF 1.3)
Underline annotation
(PDF 1.4)
Squiggly-underline
annotation
(PDF 1.3)
Strikeout annotation
Yes
Yes
Yes
Yes
StrikeOut
Stamp
Caret
Ink
Popup
FileAttachment
(PDF 1.3)
Rubber stamp annotation Yes
(PDF 1.5)
Caret annotation
(PDF 1.3)
Ink annotation
(PDF 1.3)
Pop-up annotation
(PDF 1.3)
File attachment
annotation
(PDF 1.2)
Sound annotation
(PDF 1.2)
Movie annotation
(PDF 1.2)
Widget annotation
(PDF 1.5)
Screen annotation
Yes
Yes
No
Yes
Yes
No
No
No
Sound
Movie
Widget
Screen
PrinterMark
TrapNet
Watermark
3D
(PDF 1.4)
Printer’s mark annotation No
(PDF 1.3)
Trap network annotation No
(PDF 1.6)
Watermark annotation
(PDF 1.6)
3D annotation
No
No
Markup Annotations
As mentioned in Section 8.4.1, “Annotation Dictionaries”, the meaning of an an-
notation’s
Contents
entry varies by annotation type. Typically, it is the text to be
displayed for the annotation or, if the annotation does not display text, an alter-
nate description of the annotation’s contents in human-readable form. In either
case, the
Contents
entry is useful when extracting the document’s contents in
support of accessibility to users with disabilities or for other purposes (see Sec-