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Create PdfLayer

import java.io.FileOutputStream; import com.lowagie.text.Document; import com.lowagie.text.Element; import com.lowagie.text.Phrase; import com.lowagie.text.pdf.ColumnText; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfLayer; import com.lowagie.text.pdf.PdfLayerMembership; import com.lowagie.text.pdf.PdfWriter; public class MainClass {   public static void main(String[] args) throws Exception {     Document document = new Document();     PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));     writer.setPdfVersion(PdfWriter.VERSION_1_5);     document.open();     PdfContentByte cb = writer.getDirectContent();     PdfLayer layer1 = new PdfLayer("layer 1", writer);     PdfLayer layer2 = new PdfLayer("layer 2", writer);     PdfLayer layer3 = new PdfLayer("layer 3", writer);     PdfLayerMembership cat = new PdfLayerMembership(writer);     cat.addMember(layer2);     cat.addMember(layer3);     PdfLayerMembership no_cat = new PdfLayerMembership(writer);     no_cat.addMember(layer2);     no_cat.addMember(layer3);     no_cat.setVisibilityPolicy(PdfLayerMembership.ALLOFF);     cb.beginLayer(layer1);     ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("A"), 50, 775, 0);     cb.endLayer();     cb.beginLayer(layer2);     ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("B"), 50, 750, 0);     cb.endLayer();     cb.beginLayer(layer3);     ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("C"), 50, 725, 0);     cb.endLayer();     cb.beginLayer(cat);     ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("D"), 50, 700, 0);     cb.endLayer();     cb.beginLayer(no_cat);     ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("E"), 50, 700, 0);     cb.endLayer();     document.close();   } }