ContentList sel = _parent->selected_text ();
BOOST_FOREACH (shared_ptr<Content> i, sel) {
/* These are the content types that could include subtitles */
ContentList sel = _parent->selected_text ();
BOOST_FOREACH (shared_ptr<Content> i, sel) {
/* These are the content types that could include subtitles */
_y_offset->Enable (!reference && any_subs > 0 && use && type == TEXT_OPEN_SUBTITLE);
_x_scale->Enable (!reference && any_subs > 0 && use && type == TEXT_OPEN_SUBTITLE);
_y_scale->Enable (!reference && any_subs > 0 && use && type == TEXT_OPEN_SUBTITLE);
_y_offset->Enable (!reference && any_subs > 0 && use && type == TEXT_OPEN_SUBTITLE);
_x_scale->Enable (!reference && any_subs > 0 && use && type == TEXT_OPEN_SUBTITLE);
_y_scale->Enable (!reference && any_subs > 0 && use && type == TEXT_OPEN_SUBTITLE);
_dcp_track->Enable (!reference && any_subs > 0 && use && type == TEXT_CLOSED_CAPTION);
_language->Enable (!reference && any_subs > 0 && use && type == TEXT_OPEN_SUBTITLE);
_stream->Enable (!reference && ffmpeg_subs == 1);
_dcp_track->Enable (!reference && any_subs > 0 && use && type == TEXT_CLOSED_CAPTION);
_language->Enable (!reference && any_subs > 0 && use && type == TEXT_OPEN_SUBTITLE);
_stream->Enable (!reference && ffmpeg_subs == 1);