## set_image(input_file_name, output_file_name, watermark_image_file_name) {#str_str_str} Adds an image watermark into the document. ```python def set_image(self, input_file_name: str, output_file_......output format is an image (BMP, EMF, EPS, GIF, JPEG, PNG, or WebP)...output format is an image (BMP, EMF, EPS, GIF, JPEG, PNG, or WebP)...