CHAPTER 4
384
Graphics
Example 4.39
/OCProperties
% OCProperties dictionary in document catalog
<< /OCGs [1 0 R 2 0 R 3 0 R 4 0 R]
/D << /BaseState /OFF
% The default configuration
/ON [1 0 R]
/AS [
% Auto state array of usage application dictionaries
<< /Event /View /Category [/Zoom] /OCGs [1 0 R 2 0 R 3 0 R 4 0 R] >>
<< /Event /Print /Category [/Print] /OCGs [4 0 R] >>
<< /Event /Export /Category [/Export] /OCGs [3 0 R 4 0 R] >>
]
>>
>>
...
1 0 obj
<< /Type /OCG
/Name (20000 foot view)
/Usage << /Zoom << /max 1.0 >> >>
>>
endobj
2 0 obj
<< /Type /OCG
/Name (10000 foot view)
/Usage << /Zoom << /min 1.0 /max 2.0 >> >>
>>
endobj
3 0 obj
<< /Type /OCG
/Name (1000 foot view)
/Usage << /Zoom << /min 2.0 /max 20.0 >>
/Export << /ExportState /OFF >> >>
>>
endobj
4 0 obj
<< /Type /OCG
/Name (Copyright notice)
/Usage << /Print << /PrintState /ON >>
/Export << /ExportState /ON>> >>
>>
endobj
In the example, the usage application dictionary with event type
View
specifies
that all optional content groups are to have their states managed based on zoom