Adobe AFTER EFFECTS 7.0 - To Reverse a Layer’s Playback Direction; To Time-Stretch a Layer but Not Its Keyframes; To Time-Stretch a Layer from a Specific Time; To Time-Stretch a Layer to a Specific Time

ADOBE AFTER EFFECTS 7.0
User Guide
232
See also
“Enhancing time-altered motion by blending frames” on page 169
“To apply the Timewarp effect (Pro only)” on page 239
To time-stretch a layer from a specific time
1
In the Timeline or Composition panel, select the layer.
2 Choose Layer > Time > Time Stretch.
3 Type a new duration for the layer, or type a Stretch Factor.
4 To specify the point in time from which the layer will be time-stretched, click one of the Hold In Place options,
and then click OK:
Layer In-point Holds the layer’s current starting time, and time-stretches the layer by moving the Out point.
Current Frame Holds the layer at the position of the current-time indicator (also the frame displayed in the Compo-
sition panel), and time-stretches the layer by moving the In and Out points.
Layer Out-point Holds the layer’s current ending time and time-stretches the layer by moving the In point.
To time-stretch a layer to a specific time
1
In the Timeline panel, move the current-time indicator to the frame where you want the layer to begin or end.
2 Display the In and Out columns by choosing Columns > In and Columns > Out from the Timeline panel menu.
3 Do one of the following:
• To stretch the In point to the current time, press Ctrl (Windows) or Command (Mac OS) as you click the In time
for the layer in the In column.
• To stretch the Out point to the current time, press Ctrl (Windows) or Command (Mac OS) as you click the Out
time for the layer in the Out column.
To time-stretch a layer but not its keyframes
When you time-stretch a layer, the positions of its keyframes stretch with it by default. You can circumvent this
behavior by cutting and pasting keyframes.
1 Make a note of the time at which the first keyframe appears.
2 In the layer outline, click the name of one or more layer properties containing the keyframes you want to keep at
the same times.
3 Choose Edit > Cut.
4 Move or stretch the layer to its new In and Out points.
5 Move the current-time indicator to the time at which the first keyframe appeared before you cut the keyframes.
6 Choose Edit > Paste.
To reverse a layer’s playback direction
Youcaneasilyreversealayer’splaybackdirection.Whenyoudo,allkeyframesforallpropertiesontheselectedlayer
also reverse position relative to the layer. The layer itself maintains its original In and Out points relative to the
composition.