Справочник Пользователя для Adobe acrobat 7.0.5 sdk

Adobe PDF layers are components of content that may occupy the same physical space as 
other components. Multiple components may be visible or invisible depending on their 
settings, and may be used to support the display, navigation, and printing of layered PDF 
content by various applications. 

Using the Acrobat SDK, you can display, navigate and print layered PDF documents.

This chapter consists of the following sections:

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Acrobat supports the display, navigation, and printing of layered Adobe PDF content 
output by applications such as Adobe InDesign, AutoCAD, and Microsoft Visio.

PDF layers are supported through the usage of PDF Optional Content Group (OCG) objects. 
Optional content refers to content in a PDF document that can be selectively viewed or 
hidden. Optional content became available in Acrobat 6. 

Note the following:

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You can rename and merge layers, change the properties of layers, and add actions to 
layers. You can also lock layers to prevent them from being hidden.

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You can control the display of layers using the default and initial state settings. For 
example, if your document contains a copyright notice, you can easily hide the layer 
whenever the document is displayed onscreen but ensure that the layer always prints.

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Acrobat does not allow you to author layers that change visibility according to the zoom 
level, but it does support this capability from other authoring applications.

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To direct users to a custom view using a particular layer set, you can add bookmarks to a 
PDF document that contains layers. Use this technique to highlight a portion of a layer 
that is especially important. You can add links so that users can click on a visible or 
invisible link to navigate to or zoom in on a layer.

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To create layers while exporting InDesign CS or later documents to PDF, make sure that 
Compatibility is set to Acrobat 6 (PDF 1.5) and that Create Acrobat Layers is selected in 
the Export PDF dialog box.