Add watermark annotation

Watermark annotation adds text watermark like shown at the picture below. 

There is an ability to specify the next properties for WatermarkAnnotation type:

Follow these steps to add Watermark annotation to document:

  • Instantiate Annotator object with input document path or stream;
  • Instantiate WatermarkAnnotation object with desired properties (position, color, etc);
  • Call Add method and pass WatermarkAnnotation object;
  • Call Save method with resultant document path or stream.

The following code demonstrates how to add WatermarkAnnotation to the document:

//Add watermark annotation to the document from local disk
using (Annotator annotator = new Annotator("input.pdf"))
{
	WatermarkAnnotation watermark = new WatermarkAnnotation
    {
    	Angle = 75,
        Box = new Rectangle(200, 200, 100, 50),
        CreatedOn = DateTime.Now,
        Text = "Watermark",
        FontColor = 65535,
        FontSize = 12,
        Message = "This is watermark annotation",
        Opacity = 0.7,
        HorizontalAlignment = HorizontalAlignment.Center,
        VerticalAlignment = VerticalAlignment.Center,
        Replies = new List<Reply>
        {
        	new Reply
            {
            	Comment = "First comment",
                RepliedOn = DateTime.Now
            },
            new Reply
            {
            	Comment = "Second comment",
                RepliedOn = DateTime.Now
            }
        }
    };
    annotator.Add(watermark);
    annotator.Save("result.pdf");
} 

More resources

Advanced Usage Topics

To learn more about document annotating features, please refer to the advanced usage section.

GitHub Examples

You may easily run the code above and see the feature in action in our GitHub examples:

Free Online App

Along with full-featured .NET library we provide simple but powerful free Apps. You are welcome to annotate your PDF, DOC or DOCX, XLS or XLSX, PPT or PPTX, PNG and other documents with free to use online GroupDocs Annotation App.