Timeline Editing and Navigating

Keyboard shortcut
Function
CommandArrowRightCommand-Right Arrow
Nudge one frame forward.
CommandArrowLeftCommand-Left Arrow
Nudge one frame backward.
CommandShiftArrowRightCommand-Shift-Right Arrow
Nudge ten frames forward.
CommandShiftArrowLeftCommand-Shift-Left Arrow
Nudge ten frames backward.
ShiftLeftBraceShift-Left Brace ({)
Move the selected object to the In point.
ShiftRightBraceShift-Right Brace (})
Move the selected object to the Out point.
II
Mark the In point of the play range.
OO
Mark the Out point of the play range.
OptionXOption-X
Reset the play range by moving the In and Out points to the first and last frames of the project.
ShiftLShift-L
Enable/Disable loop playback.
OptionAOption-A
Open the Recording Options dialog.
ShiftHomeShift-Home
Go to the start of play range.
ShiftEndShift-End
Go to the end of play range.
ShiftIShift-I
Go to the In point of the selected object.
ShiftOShift-O
Go to the Out point of the selected object.
ArrowLeftLeft Arrow
Go to the previous frame.
ArrowRightRight Arrow
Go to the next frame.
ShiftArrowLeftShift-Left Arrow
Go backward ten frames.
ShiftArrowRightShift-Right Arrow
Go forward ten frames.
CommandOptionArrowLeftCommand-Option-Left Arrow
Go to the next marker.
CommandOptionArrowRightCommand-Option-Right Arrow
Go to the previous marker.
CommandRCommand-R
Render a RAM Preview for the play range.
CommandOptionRCommand-Option-R
Render a RAM Preview for the selected object.
CommandShiftOptionRCommand-Shift-Option-R
Render a RAM Preview for the entire project.
II
Mark an In point.
OO
Mark an Out point.
MM
Add a marker at the current frame.
GraveAccentGrave Accent (`)
Add a marker at the current frame.
CommandOptionMCommand-Option-M
Open the Edit Marker dialog.
SpacebarSpace bar
Play/Pause the project.
AA
Record animation.
HomeHome
Go to the start of project.
EndEnd
Go to the end of project.
CommandKCommand-K
Convert the applied behaviors to keyframes.
ShiftDeleteShift-Delete
Perform a ripple delete.
CommandOptionVCommand-Option-V
Paste special.