PDF Sticky Annotations

Add Watermark Annotation

A watermark annotation shall be used to represent graphics that shall be printed at a fixed size and position on a page, regardless of the dimensions of the printed page.

You can add Watermark Text using WatermarkAnnotation at a specific position of the PDF page. The opacity of Watermark can also be controlled by using opacity property.

Please check the following code snippet to add WatermarkAnnotation.

    // Open document
    $document = new Document($inputFile);
    $fontRepository = new FontRepository();
    $colors = new Color();
    // get particular page
    $page = $document->getPages()->get_Item(1);
    
    //Create Annotation
    $wa = new WatermarkAnnotation($page, new Rectangle(100, 500, 400, 600));

    //Add annotation into Annotation collection of Page
    $page->getAnnotations()->add($wa);

    //Create TextState for Font settings
    $ts = new TextState();

    $ts->setForegroundColor($colors->getBlue());
    $ts->setFont($fontRepository->findFont("Times New Roman"));
    $ts->setFontSize(32);

    //Set opacity level of Annotation Text
    $wa->setOpacity(0.5);
            
    $watermarkStrings = ["Aspose.PDF", "Watermark", "Demo" ];
    //Add Text to Annotation
    $wa->setTextAndState($watermarkStrings, $ts);

    // Save resulting PDF document.    
    $document->save($outputFile);
    $document->close();