Expressions


show more Expressions provides you with in-depth training on Video. Taught by Chris Meyer and Trish Meyer as part of the After Effects CS4: Apprentice's Guide to Key Features show less
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Expressions

One of the most powerful features in After Effects is Expressions. An Expression is a small piece of code that allows the parameter of one layer or one effect to follow another parameter or another layer or another effect, whatever you choose. It can be thought as an alternative to keyframing. Rather than having to copy and paste keyframes, you can just express one parameter to follow another parameter. For example, here I have already keyframed the blue pulley and now I want to make the red pulley follow along. Well the first thing you need to do is reveal the parameters you wish to express. I have already got Scale and Rotation revealed for the blue pulley. I will select the red pulley, type S to reveal its Scale, then Shift+R to also add its Rotation value.

To enable Expression, I will hold down the Option key on Mac or Alt key on the Windows and click on the animation stopwatch. Once I do so, you will see an extra line gets revealed in the Timeline panel. The Expression for Scale. A...

Expressions
Video duration: 13m 26s 1h 29m Intermediate

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Expressions provides you with in-depth training on Video. Taught by Chris Meyer and Trish Meyer as part of the After Effects CS4: Apprentice's Guide to Key Features

Subject:
Video
Software:
After Effects
Authors:
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