LwgPhrase explanation = new LwgPhrase("Layer grouping", new LwgFont(LwgFont.HELVETICA, 20, LwgFont.BOLD, Color.red));
ColumnText.showTextAligned(cb, LwgElement.ALIGN_LEFT, explanation, 50, 650, 0);
PdfLayer l1 = new PdfLayer("Layer 1", writer);
PdfLayer l2 = new PdfLayer("Layer 2", writer);
PdfLayer l3 = new PdfLayer("Layer 3", writer);
PdfLayerMembership m1 = new PdfLayerMembership(writer);
m1.addMember(l2);
m1.addMember(l3);
LwgPhrase p1 = new LwgPhrase("Text in layer 1");
LwgPhrase p2 = new LwgPhrase("Text in layer 2 or layer 3");
LwgPhrase p3 = new LwgPhrase("Text in layer 3");
cb.beginLayer(l1);
ColumnText.showTextAligned(cb, LwgElement.ALIGN_LEFT, p1, 50, 600, 0);