General Editing

Keyboard shortcut
Function
CommandZCommand-Z
Undoes the last command.
CommandShiftZCommand-Shift-Z
Redoes the last undone command.
CommandXCommand-X
Cuts the selected item.
CommandShiftXCommand-Shift-X
Ripple cuts the selected item.
CommandCCommand-C
Copies the selected item.
CommandVCommand-V
Pastes the cut or copied item.
ShiftDeleteForwardShift-Forward Delete
Ripple deletes the selected item.
CommandDCommand-D
Duplicates the selected item.
CommandACommand-A
Selects all items in the window.
CommandShiftACommand-Shift-A
Deselects all items in the window.
CommandShiftOptionXCommand-Shift-Option-X
Ripple cuts to the next edit.
ShiftOptionDeleteShift-Option-Delete
Ripple deletes to the next edit.