Adobe AFTER EFFECTS 5.5 Help Manual page 342

Adobe After Effects Help
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For information about setting Vector Paint Preferences, see "Selecting viewing options (PB
only)" on page 347.
Setting playback speed (PB only)
The Playback Speed value in the Effect Controls window can change the timing at which
painted strokes appear in previews and rendered compositions. Playback Speed affects
the Vector Paint strokes only when you set the Playback Mode to Past Strokes, Hold
Strokes, or Animate Strokes.
When you create strokes on a layer, the stroke is tied to the location of the Time Marker in
the Timeline when you start drawing. Vector Paint also records the amount of time you
take to draw the stroke. For example, you might start painting a stroke with the Time
Marker set to 0:00 and use 1.5 seconds to draw the stroke. Then, you might move the time
marker to 2:00 and draw a second stroke (leaving 0.5 seconds between the completion of
the first stroke and the beginning of the second one). For this example, let's say you use
1.0 second to draw the second stroke. The entire process covers 3.0 seconds on the
Timeline.
By changing the playback speed, you can change the timing for stroke appearances in
previews and rendered compositions. The results that your changes produce depend on
the Playback Mode setting that you select in the Effect Controls window:
Animate Strokes With the Playback Speed at 1.0, each stroke appears as if drawn by an
unseen hand, taking the same amount of time as you used to create it. When you increase
the Playback Speed value, the amount of time used to draw each stroke is reduced. The
gaps between strokes are also reduced. If you decrease Playback Speed, both the time
taken to draw the strokes and the length of the gaps between strokes increases.
Using the example described above in this topic, if you increase the Playback Speed value
to 2.0 (double the speed), the first stroke would be drawn in 0.75 seconds, the gap
between the two strokes would be shortened to 0.25 seconds, and the second stroke
would be drawn in 0.5 seconds. The entire animation would be complete after 1.5 seconds
of playback.
Past Strokes At Playback Speed 1.0, each stroke appears in completed form at the frame
in which you started drawing and remains visible for the duration of the layer playtime.
When you increase Playback Speed, each stroke appears at an earlier point in time. If you
decrease Playback Speed, strokes occur at later points in time.
Hold Strokes Like Past Strokes mode, each stroke appears in completed form at the
frame in which it was drawn. The difference between this and Past Strokes mode is that in
Hold Strokes mode, each stroke disappears when the next stroke appears (without any
gap between the disappearance of the first stroke and the appearance of the second).
Otherwise, the results of changing Playback Speed are similar to those in Past Strokes
mode.
To adjust the Playback Speed:
1 In the Effect Controls window under Vector Paint, make sure that the Playback Mode
option is one of the following: Past Strokes, Hold Strokes, or Animate Strokes.
2 In the Effect Controls window, click the underlined Playback Speed value and type a
new value, using a number between 0 and 100.
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