Add text watermark

GroupDocs.Viewer enables you to apply a watermark on the output pages (HTML / Image / PDF).

Here is the recipe:

• Create instance of HtmlViewOptions class (or PngViewOptions, or JpgViewOption, or PdfViewOptions);
• Create a Watermark object and populate its properties;
• Assign Watermark object to setWatermark() property of class HtmlViewOptions, PngViewOptions, JpgViewOption or PdfViewOptions;
• Call view() method.

The following code sample shows how to apply the watermark to the output pages.

    try (Viewer viewer = new Viewer("sample.docx")) {
        HtmlViewOptions viewOptions = HtmlViewOptions.forEmbeddedResources();
        viewOptions.setWatermark(new Watermark("This is a watermark"));
    
        viewer.view(viewOptions);
    }