svoid showImageWithRecognizedTexts_makeTeachable(final ImageSurface is, final L<RecognizedText> lines, final File outFile) {
  onImageSurfaceHighlightChange(is, voidfunc(Rect r) {
    RecognizedText rec = findByField(lines, +r);
    setToolTip(is, rec == null ? null : str(rec.text));
  });
  
  imageSurfacePopupMenuWhenHighlighted_top(is, voidfunc(JPopupMenu menu, final Rect r) {
    addPopupMenuItem(menu, "OK", r {
      RecognizedText rec = findByField(lines, +r);
      appendToTextFile_uniq(outFile,
        struct(ll(rec.text!, rec.r)));
    });
    addSeparator(menu);
  });
}