Apple Final Cut Express 4 - Manual (Page 108)

108 Part II Learning About the Final Cut Express Interface
To begin forward playback at normal (1x) speed:
m Press L.
To begin reverse playback at normal (1x) speed:
m Press J.
To pause playback:
m Press K.
To double the current playback speed:
m Press L or J again.
You can play back up to eight times normal speed, switching from 1x to 2x to 4x to 8x
normal speed (pressing either key a total of 4 times).
Pressing the key for playback in the opposite direction halves the playback speed,
slowing playback in that direction down until it reaches 1x playback. Playback then
begins doubling in reverse, starting from 1x.
To immediately reverse the playback direction:
m Press K to pause, then press the key for the direction you want.
To move the playhead one frame at a time:
m Hold down the K key, then press J or L.
To move the playhead at 1/3x speed:
m Hold down the K key, then press and hold down J or L.
Note: When using keyboard shortcuts for device control, the speed of forward (L) and
reverse (J) may differ depending on your video equipment.