Apple Motion 3 - Manual (Page 350)

350 Chapter 4 Using the Timeline
Retiming in the Timeline
By default, a 60-frame clip played back at 30 frames per second takes two seconds to
display its 60 frames. If its In point is frame 1, its Out point is frame 60. Speed and
duration are interactive; that is, if you increase the speed at which the clip plays back,
its duration automatically decreases. Playing back the same clip at 15 frames per
second would take twice as long. The clip’s In point remains the same, but its Out point
is now 120.
For more detailed information about retiming, see “ Retiming ” on page 312. For more
information on using the Retiming behaviors, see “ Retiming Behaviors ” on page 453.
Adjusting a Clip’s Speed
Motion allows you to easily change the timing of clips in the Timeline.
To speed up a clip:
m With the pointer over the start or end of the clip, press and hold down the Option key.
The pointer turns into the retime pointer.
To shorten the clip’s duration and speed up its playback speed, do one of the following:
 Drag the In point of the clip’s bar to the right.
 Drag the Out point of the clip’s bar to the left.
As you drag, the tooltip displays the clip’s duration and speed.
To slow down a clip:
m With the pointer over the start or end of the clip, press and hold down the Option key.
The pointer turns into the retime pointer.
To lengthen the clip’s duration and slow down its playback speed, do one of the
following:
m Drag the In point of the clip’s bar to the left.
m Drag the Out point of the clip’s bar to the right.
As you drag, the tooltip displays the clip’s Duration and Speed.
Looping a Clip
When a looped clip reaches its last frame, it starts playing again from its first frame.
Another way of extending a clip’s duration is by looping it. You can easily loop a clip by
adjusting it in the Timeline.