## merge_streams(output_stream, input_streams, save_format) {#bytesio_bytesiolist_saveformat} Merges the given input documents into a single output document using specified input output streams and......an image (BMP, EMF, EPS, GIF, JPEG, PNG, or WebP), only the first...an image (BMP, EMF, EPS, GIF, JPEG, PNG, or WebP), only the first...