You can name them however you like, but I think these names are the most obvious. One named Frequencythe other one Amplitude. This can easily be resolved by creating a null layer, typically named Controller, to which you would apply two Slider Control effects. You often might want to keyframe a wiggled value. If you would like instead to have x wiggled normally, but y and z to have a bigger wiggle you could do: var low_wiggle = wiggle(.5, 20) The only difference with a 3D layer is that it would need a third value.
Here, only our value x will have the wiggle. If you want to just wiggle one of the axis of a 2D layer you can simply do this: var wiggle = wiggle(.5, 20) If you are applying it on a 3D layer, it returns an array of three numbers ( ) and if you are applying it on a 2D layer it returns an array of two numbers ( ). The wiggle function returns an array or numbers. So if you would like your position to move on a scale of 20 pixels every half second you would use this expression on the position property: wiggle(.5, 20) The typical wiggle expression in After Effects is this: wiggle(frequency, amplitude)
