document1.add(image);
Annotation a4 = new Annotation(
250f, 250f, 350f, 350f, PdfAction.LASTPAGE);
document1.add(a4);
// draw rectangles to show where the annotations were added
cb1.rectangle(250, 700, 100, 100);
cb1.rectangle(250, 550, 100, 100);
cb1.rectangle(250, 400, 100, 100);
cb1.rectangle(250, 250, 100, 100);
cb1.stroke();
// more content