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// For complete examples and data files, please go to https://github.com/groupdocs-signature/GroupDocs.Signature-for-Java
// setup Signature configuration
SignatureConfig signConfig = CommonUtilities.getConfiguration();
// instantiating the conversion handler
SignatureHandler<String> handler = new SignatureHandler<String>(signConfig);
// setup image signature options with relative path - image file stores in config.ImagesPath folder
WordsSignTextOptions signOptions = new WordsSignTextOptions("John Smith");
// setup Signature area Size
signOptions.setLeft(100);
signOptions.setTop(100);
signOptions.setWidth(200);
signOptions.setHeight(200);
// setup Signature area Margins
signOptions.setMargin(new Padding(10));
// specify separate left margin value
signOptions.getMargin().setLeft(20);
final SaveOptions saveOptions = new SaveOptions();
saveOptions.setOutputType(OutputType.String);
// sign document
String signedPath = handler.<String>sign(CommonUtilities.getStoragePath(fileName), signOptions, saveOptions);
System.out.println("Signed file path is: " + signedPath);