Re: ONE MORE QUESTION: wiggle expression

When we first learn about expressions, we use the pickwhip to connect one property with another and create an expression. (check the help) This pickwhip is useful in other situations -- this being one of them.

1) apply effect>expression controls>slider control to the layer. It can be applied to any layer, even a null, actually.
2) make this control visible in the timeline. Try selecting the layer then hitting the E key.
3) rename the effect "amp slider".
4) Make sure your wiggle expression is visible in the timeline. Try hitting EE. You may have to hit U or UU, depending on what appears and disappears.
5) highlight the word "amp" in the wiggle expression.
6) drag the pickwhip from that expression to the "amp slider" effect in the timeline.

Now the amplitude of the wiggle matches the value of the slider. Animate the value of the slider (using keyframes as usual) to change the amplitude (amount) of wiggle.

You can do the same with the wiggle's frequency and another slider named "freq slider", for example.

Hope that helps ...