APPENDIX H
1114
Compatibility and Implementation Notes
83. Acrobat viewers earlier than version 3.0 ignore an annotation’s Hidden
and Print flags. Annotations that should be hidden are shown; annota-
tions that should be printed are not printed. Acrobat 3.0 ignores the Print
flag for text and link annotations.
84. Acrobat 5.0 obeys the Locked flag only for widget annotations. In Acrobat
6.0, markup annotations support it as well.
85. In Acrobat 6.0, the ToggleNoView flag is applicable to mouse-over and se-
lection events.
86. If an Acrobat viewer encounters a border style it does not recognize, the
border style defaults to
S
(Solid).
87. Acrobat 5.0 treats the annotation appearance as an isolated group, regard-
less of whether a
Group
entry is present. This behavior is corrected in Ac-
robat 6.0.
88. Acrobat viewers display annotations whose types they do not recognize in
closed form, with an icon containing a question mark. Such an annotation
can be selected, moved, or deleted, but if the user attempts to activate it, an
alert appears giving the annotation type and reporting that a required
plug-in is unavailable.
89. Acrobat viewers report an error when a user activates a link annotation
whose destination is of an unknown type.
90. When a link annotation specifies a value of
P
for the
H
entry (highlighting
mode), Acrobat viewers display the link appearance with a beveled border,
ignoring any down appearance that is defined (see Section 8.4.4, “Appear-