Apple Soundtrack Pro 3 - Manual (Page 477)

Function Keyboard shortcut
Removes the cycle region In point.
option I
Removes the cycle region Out point.
option O
Moves the cycle region playhead to the In point.
shift I
Moves the cycle region playhead to the Out point.
shift O
General Editing
Function Keyboard shortcut
Undoes the last command.
Z
Redoes the last undone command.
shift Z
Cuts the selected item.
X
Ripple cuts the selected item.
shift X
Copies the selected item.
C
Pastes the cut or copied item.
V
Ripple deletes the selected item.
shift
delete
Duplicates the selected item.
D
Selects all items in the window.
A
Deselects all items in the window.
shift A
Ripple cuts to the next edit.
shift option X
Ripple deletes to the next edit.
shift option delete
Editing Audio Clips in the Timeline
Function Keyboard shortcut
Opens the Paste Repeat dialog so that you can paste multiple copies
of the cut or copied audio clip.
option V
477 Appendix A Soundtrack Pro Keyboard Shortcuts