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Using Help | Contents
7 Set a Magnitude to specify the maximum size of the deviations. After Effects sets the
specified magnitude to the units of the selected property, so a value for one property may
produce very different results in another property.
8 Click Apply and preview the results.
9 If necessary, choose Edit > Undo The Wiggler to reset the keyframes, adjust the values
for Frequency and Magnitude, and then reapply The Wiggler.
Simulating a zoom lens (PB only)
You can simulate a more realistic accelerating effect of a zoom lens when working with 2D
layers by using Exponential Scale, which converts linear scaling of a layer to exponential
scaling. This is useful for creating a cosmic zoom, for example. Zooming optically with a
lens is not linear—the rate of change of scaling accelerates as you zoom. To simulate this
acceleration, Exponential Scale converts the velocity of the scaling to an exponential
curve.
To apply Exponential Scale:
1 In the Timeline window, hold down the Shift key and select starting and ending
keyframes for the scale property.
2 Choose Animation > Keyframe Assistant > Exponential Scale.
Note: Exponential Scale replaces any existing keyframes between the selected starting
and ending keyframes.
About tracking motion (PB only)
The Tracker/Stabilizer tracks motion by matching pixels from a selected area in the first frame
to pixels in each succeeding frame, thereby following that motion. For example, suppose you
have footage of a bareheaded person walking, and you'd like to add a hat to this person's
head. Use the Tracker controls to isolate the top of the head and track its motion in the first
layer, and apply the tracked motion to an image of a hat in a second layer.
Using Help | Contents
Using Property and Tracking Controls (PB only)
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