From the course: After Effects CS5 Essential Training

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Modifying simple expressions

Modifying simple expressions

Now we're continuing where we left off here. So, I want to show you this little quick tip that you can actually modify expressions to suit your needs. So, we have this expression already where the right wheel is connected to the left wheel via this expression. But let's say, for example, that we want the right wheel to spin twice as fast as the layer on the left. So, what I'm going to do is actually take this to 0, click the stopwatch for Rotation, and we'll go out in time about 3 seconds, and we'll rotate this a certain amount. We'll go ahead and press the letter N to set the end of the work area because it's over 8 seconds long. We really don't need that much extra time. So, what I'm going to do is click inside of the expression. As you can see, they're both rotating now. I'm going to click inside this expression and I'm going to click on the end of the expression and put our cursor there and I'm going to type *2. And what that's going to do is it's going to say okay, take this…

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