_key->Enable (s && _film && _film->encrypted ());
_edit_key->Enable (s && _film && _film->encrypted ());
_reel_type->Enable (s);
- _reel_length->Enable (s);
+ _reel_length->Enable (s && _film && _film->reel_type() == REELTYPE_BY_LENGTH);
_frame_rate_choice->Enable (s);
_frame_rate_spin->Enable (s);
_audio_channels->Enable (s);