Separate Dimensions in After Effects 20/10/2015

Here is a hidden gem in After Effects... Ever tried to use the "wiggle" expression on a layer's position, but only horizontally or vertically? When you wiggle a property, it will get randomised on all dimensions independently. Let's assume you wanted that to happen only sideways..  

Below is a sample composition where you might want to randomly move the layer left/right:  

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When you press "P" to reveal the position property of that layer, you will see that only one item will appear. But we want to see X and Y dimensions separately. Go ahead and right click on the word "Position".  

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From the contextual menu, click "Separate Dimensions".  

Voila! Now the single position property has been replaced with two separate ones: X Position and Y Position.  

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You can now apply a wiggle expression to only one of these two, like our example below. Seperate-Dimensions-in-After-Effects-4

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