// create an annotation viewer
var annotationViewer = new Vintasoft.Imaging.Annotation.UI.WebAnnotationViewerJS("WebAnnotationViewer1");
...

// get image that is focused in annotation viewer
var image = annotationViewer.get_FocusedImage();
// if annotation viewer has focused image
if (image != null) {
    // get annotation controller that is associated with annotation viewer
    var annotationController = annotationViewer.get_AnnotationController();
    // burn annotation collection on image and save changed image to a new file
    annotationController.burnAnnotationCollection(
        image,
        false,         // specify that changed image must be saved to a new file
        __annotationController_burnAnnotationCollection_success,
        __annotationController_burnAnnotationCollection_error);
}


/*
 * Annotations are successfully burned on image.
 */
function __annotationController_burnAnnotationCollection_success(data, status, e) {
    // get information about new image
    var newImageInfo = data.imageInfo;
    // get identifier (name) of new image file
    var newImageId = newImageInfo.fileInfo.id;

    // download new image file
    Vintasoft.Imaging.VintasoftFileAPI.downloadImageFile(newImageId, __onDownloadFile_success, __onDownloadFile_error);
}

/*
 * Annotations are not burned on image.
 */
function __annotationController_burnAnnotationCollection_error(data, status, e) {
    alert('Burn annotations error.');
}

/*
 * Image file is successfully downloaded from server.
 */
function __onDownloadFile_success(data) {
    // get a blob, which contains data of downloading file
    var blob = data.blob;
    // get name of downloading file
    var filename = data.filename;
    ...
}

/*
 * Image file is not downloaded from server.
 */
function __onDownloadFile_error(data) {
    alert('File download error.');
}