Markup Annotations using Java

Add highlight, underline, squiggly, or strikeout annotations

1. Open the input PDF and select the page area where the markup annotation should appear.
2. Create the required annotation type and configure its metadata or visual properties.
3. Add the annotation to the page collection and save the document.

public static void addTextHighlightAnnotation(Path inputFile, Path outputFile) {
    try (Document document = new Document(inputFile.toString())) {
        HighlightAnnotation highlightAnnotation = new HighlightAnnotation(
                document.getPages().get_Item(1), new Rectangle(300, 750, 320, 770, true));
        document.getPages().get_Item(1).getAnnotations().add(highlightAnnotation);
        document.save(outputFile.toString());
    }
}

public static void addTextUnderlineAnnotation(Path inputFile, Path outputFile) {
    try (Document document = new Document(inputFile.toString())) {
        UnderlineAnnotation underlineAnnotation = new UnderlineAnnotation(
                document.getPages().get_Item(1), new Rectangle(299.988, 713.664, 308.708, 720.769, true));
        underlineAnnotation.setTitle("Aspose User");
        underlineAnnotation.setSubject("Inserted Underline 1");
        underlineAnnotation.setFlags(AnnotationFlags.Print);
        underlineAnnotation.setColor(Color.getBlue());
        document.getPages().get_Item(1).getAnnotations().add(underlineAnnotation);
        document.save(outputFile.toString());
    }
}