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APPENDIX H                                    Compatibility and Implementation Notes



8.4.2, “Annotation Flags”
 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.


8.4.3, “Border Styles”
 86. If an Acrobat viewer encounters a border style it does not recognize, the
     border style defaults to S (Solid).


8.4.4, “Appearance Streams”
 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.


8.4.5, “Annotation Types”
 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.


8.4.5, “Annotation Types” (Link Annotations)
 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-
     ance Streams”).

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