Adobe 65008009 - After Effects CS4 Using Manual page 376

Last updated 12/21/2009
6 In the Composition panel, drag the start selector to the left edge of the text (the value will be at 0).
Move the current-time indicator to 5 seconds and drag the start selector in the Composition panel to the right edge
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of the text (the value will be 5).
8 Preview the composition.
Note: By default, the Smoothness property is set to 100%. To create a typewriter appearance, expand the Advanced
property and set Smoothness to 0%.
More Help topics
"Create a composition" on page 55
"Enter point text" on page 343
"Text selectors" on page 358
"Set or add keyframes" on page 214
"Preview video and audio" on page 195
Example: Animate text with multiple selectors
This example uses the
selectorValue
of characters flash on and off randomly.
1 Create a new composition.
Create a new text layer.
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3 In the Timeline panel, choose Opacity from the Animate menu for the text layer.
Expand the text layer and its animator in the Timeline panel.
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Select the Range Selector and delete it.
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6 Choose Add > Selector > Wiggly next to the Animator property group for the text layer.
Choose Add > Selector > Expression. If the Wiggly selector doesn't come before the Expression selector, drag the
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Wiggly selector above the Expression selector.
8 Expand the Expression Selector.
Expand the Amount property to reveal the expression. The following expression appears by default:
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selectorValue * textIndex/textTotal
Replace the default expression text with the following expression:
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r_val=selectorValue[0];
if(r_val < 50)r_val=0;
if(r_val > 50)r_val=100;
r_val
11 Set the opacity to 0%, and preview the composition.
More Help topics
"Create a composition" on page 55
"Enter point text" on page 343
parameter in an Expression selector with the Wiggly selector to make a string
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USING AFTER EFFECTS CS4
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