| Package | Description | 
|---|---|
| com.itextpdf.kernel.pdf | |
| com.itextpdf.kernel.pdf.annot | |
| com.itextpdf.kernel.pdf.canvas | |
| com.itextpdf.kernel.pdf.layer | |
| com.itextpdf.kernel.pdf.xobject | 
| Class and Description | 
|---|
| PdfOCProperties 
           This class represents /OCProperties entry if pdf catalog and manages the layers of the pdf document. 
          | 
| Class and Description | 
|---|
| IPdfOCG 
           The interface generalizing the layer types (PdfLayer, PdfLayerMembership). 
          | 
| Class and Description | 
|---|
| IPdfOCG 
           The interface generalizing the layer types (PdfLayer, PdfLayerMembership). 
          | 
| Class and Description | 
|---|
| IPdfOCG 
           The interface generalizing the layer types (PdfLayer, PdfLayerMembership). 
          | 
| PdfLayer 
           An optional content group is a dictionary representing a collection of graphics that can be made visible or invisible dynamically by users of viewer applications. 
          | 
| PdfVisibilityExpression 
           An array specifying a visibility expression, used to compute visibility of content based on a set of optional content groups. 
          | 
| Class and Description | 
|---|
| IPdfOCG 
           The interface generalizing the layer types (PdfLayer, PdfLayerMembership). 
          | 
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