Adobe After Effects - Manual (Page 376)

Wiggles/Second
Correlation
Temporal and Spatial Phase (revolutions + degrees)
Lock Dimensions
Random Seed
textIndex
textTotal
selectorValue
Note:
How many variations from the set selection occur per second.
Correlation between variations for each character. At 100%, all characters wiggle by the same amount at the same time, and at 0%,
all characters wiggle independently.
The variation of wiggle, based on the phase of your animation in time (temporal) or per
character (spatial).
Scales each of the dimensions of the wiggled selection by the same value. This option is useful when wiggling the Scale
property.
See Randomness and random seeds .
Jonathan Fowler provides a video tutorial on his website that shows how to use the Wiggly Selector to randomly animate (offset) characters to
create a fluctuating string of binary digits (1s and 0s).
Expression selector properties
Expand the Expression Selector property group and the Amount property group to reveal the expression field in the Timeline panel. By default, the
Amount property begins with the expression selectorValue * textIndex/textTotal.
Expression selectors allow you to express the selector values for each character. The expression is evaluated once per character. Each time it is
evaluated, the input parameter textIndex is updated to match the index of the character.
Apply the Text Bounce or Inch Worm animation preset to a text layer to see how expression selectors can be used. To see all expressions on a
layer, select the layer and press EE.
In addition to the expression elements you use elsewhere, you can use the following attributes to animate selections in any number of interesting
ways:
Returns the index of the character, word, or line.
Returns the total number of characters, words, or lines.
Returns the value of the previous selector. Think of this value as the input from the selector above the expression selector in the
stacking order.
The attributes textIndex, textTotal, and selectorValue can be used only with the expression selector. Using them elsewhere results in a
syntax error.
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