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// For complete examples and data files, please go to https://github.com/groupdocs-viewer/GroupDocs.Viewer-for-Java
try {
	// Setup GroupDocs.Viewer config
	ViewerConfig config = Utilities.getConfiguration();
	// Create html handler
	ViewerHtmlHandler htmlHandler = new ViewerHtmlHandler(config);
	String guid = fileName;

	HtmlOptions options = new HtmlOptions();

	// Set watermark properties
	Watermark watermark = new Watermark(watermarkText);
	//Set color for watermark with values Red, Green, Blue and Alpha(Transparency) 
	Color watermarkColor = new Color(200, 75, 75, 100);
	watermark.setColor(watermarkColor);
	watermark.setPosition(WatermarkPosition.Diagonal);
	watermark.setWidth(100f);

	options.setWatermark(watermark);

	// Get document pages html representation with watermark
	List<PageHtml> pages = htmlHandler.getPages(guid, options);
	for (PageHtml page : pages) {
		Utilities.saveAsHtml(page.getPageNumber() + "_" + fileName, page.getHtmlContent());
	}
} catch (Exception exp) {
	System.out.println("Exception: " + exp.getMessage());
	exp.printStackTrace();
}