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Only visible if the zoom factor is between 75 and 125%

import java.io.FileOutputStream; import java.util.ArrayList; 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.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 zoom = new PdfLayer("Zoom 0.75-1.25", writer);     zoom.setOnPanel(false);     zoom.setZoom(0.75f, 1.25f);     cb.beginLayer(zoom);     ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase(         "Only visible if the zoomfactor is between 75 and 125%"), 30, 530, 90);     cb.endLayer();     document.close();   } }