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The point of this video is to actually give you a little helping hand when it comes to getting use to working with behaviors. Because while they are great to work with, when you are first getting started there are some gotchas that you kind of need to be aware of, especially when it comes to trimming and sliding your behaviors around in the Timeline. For example, let's select the Grow word, just click on it in your canvas, and let's go to the Library and look at some behaviors. In the Behaviors tab, go to Basic Motion, and choose Grow/Shrink.
And you notice this scales an object larger or smaller, continuously or to a specific value. Now, that seems well and good, but when you trim it, there is something you need to be aware of. So let's go ahead and apply that behavior by clicking the Apply button. I know the behavior has been applied, because again I can see in the mini Timeline. Open the HUD, and let's actually have this word Grow by clicking on one of the corners and just dragging it out. Now I begin playback, so we can see what's happening.
It's pretty straightforward, but what if I want my word to grow, and then stop at a specific place. If you move your playhead to where you'd like the word to stop growing, I'm going to drag mine to around frame 100, and trim out the behavior by pressing O on the keyboard. First off, you notice it trimmed the behavior, but it also scaled up the word to make sure it got to the end point before the end of the behavior. So in essence, when we made the behavior shorter, it just made the word Grow that much faster based on how much we dragged the square up.
Now move your playhead back to the beginning of your Timeline, and click the Play button and watch what happens. It's kind of frustrating, but the word actually snaps back. So the way I recommend most people use the Grow/Shrink behavior is actually only use it when you want your word to continue growing. So for example, if you just click-and- drag on the behavior to happen at the end of the Timeline, as long as the edge of the behavior is going off the end of your project, you should be fine. So if we can move our playhead to before the behavior, you can hit the Play button and see what happens.
The word will start to grow and it will work fine, because you have reached to the end of the composition. But that's just something you want to kind of keep in mind, as you are getting used to working with Grow and Shrink. Great for sliding, not so much for trimming. Next, let's look at Throw. I'm going to move my HUD out of the way, and select that again in the Library. And you'll notice it applies a single force to push an object at a specified direction. So let's go ahead and apply that behavior, click the Apply button, and let's begin playback as we drag in the circle to have it go in a specific direction.
Now, what if I wanted this behavior to stop right here, why don't we trim the behavior this time by dragging it? Click on the end on the right-hand side after you see this little bracketed icon, and drag it over towards left. If you hold down Shift when you get near the playhead, it will snap right to the playhead. Now look what happens. The behavior actually just stops get in its tracks. Whereas when we trim the Grow behavior, it actually made sure to complete the grow in a faster time.
With the Throw behavior, it actually just stops it right where you trim the behavior. The last two we'll checkout are Move and Fade. Go ahead and select the word Move, and select the behavior in the Library tab, and you notice this moves an object to a specific position. This time, let's apply the behavior by dragging and dropping it directly onto the word. And you notice it automatically set the behavior to have it move to the center of the screen. Go ahead and move that down a little bit, just so we don't have the words crossing each other and begin playback.
Let's stop right here, and press O on the keyboard to trim the out point, and you'll notice Move did the same thing that Grow did. It made sure to complete its full length of motion before the end of the behavior. Well, one of the nice things is it actually holds its place when it reaches that point, unlike Grow which snaps back, which leads us to Fade. Go ahead and move your playhead back to the beginning, select the word Fade and select Fade In/Fade Out in the Library tab. Let's go ahead and drag and drop this on the word Fade as well.
Again playback and you'll notice it will fade in over 20 frames and then once we get to the end of the composition, it will actually fade out over 20 frames. So let's see what happens when we trim this. I'm just going to stop playback and press O on the keyboard to trim the out point. Click Play from beginning, and you notice it fades out, but then pops right back on, much like the Throw behavior. So I hope I haven't made you too nervous about using behaviors, but honestly, they are quite helpful and I think you'll be very interested to check out our video on combining keyframes and behaviors, because it's a great way of actually getting around a bunch of these gotchas.
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