Apple Compressor (4.0) - Manual (Page 266)

Chapter 10 Keyboard shortcuts 266
Action Shortcut
Navigate through text fields in all panes Press the Tab key
Open the Mount Cluster Storage dialog Command-Shift-M
Open Compressor Help Command-Shift-Slash (/)
Preview window keyboard shortcuts
Action Shortcut
Start fast reverse motion J
Start fast forward motion L
Go to the previous frame Press the Left Arrow key
Go to the next frame Press the Right Arrow key
Start or stop clip playback Press the Space bar
Add or remove a marker at the current frame M
When the playhead is positioned on a marker, open a
dialog for editing the marker Command-E
Mark an In point I
Mark an Out point O