Watermark Annotation

A watermark annotation defines graphics that appear on a page at a fixed size and position, regardless of the dimensions of the printed page. Watermarks are commonly used to display labels such as drafts, confidential marks, or other document status indicators.

Use the WatermarkAnnotation class to add watermark annotations to a PDF document.

const inputDocData = await Util.loadFile("CompleteJavaScriptBook.pdf");
const doc = PdfDocument.load(inputDocData);

//Loop over pages, add a watermark to each page:
for (const page of doc.pages)
{
    // Create an instance of WatermarkAnnotation class and set its relevant properties
    const watermark = new WatermarkAnnotation();
    watermark.rect = { x: 72, y: 72, width: page.width - 72 * 2, height: page.height - 72 * 2 };
    watermark.text = "DRAFT";
    watermark.textFormat = new Format({
        font: Font.getPdfFont(StandardPdfFont.CourierBold),
        fontSize: 108,
        foreColor: "#FF000080" // semitransparent RED color
    });
    watermark.page = page;
}
const docData = doc.savePdf();
Util.saveFile("WatermarkAnnotation.pdf", docData);