Advanced controller shortcuts                                            Normally, frames of a video movie may be skipped if the number of frames per second stored on disk is greater than the number the computer can show. You can choose to show every frame instead of keeping a constant rate: Play Every Frame: Option-Play                                            A movie usually plays at its normal rate — one second of movie time passes every second. To speed the movie up or slow it down, you may use the Control key (not the Command key): Movie Speed: Control-Drag Step Buttons