If I duplicate my skater one here, And I double-click to Open, and let's say now I have a new guy wanna give them a new title, but let's just work on replacing the photo here. Well, if I was going to do a whole bunch of photos, doing it this way would not be the most efficient way, and I'll show you why. It lines up at half of the composition here, okay? So let's say I was doing something or I needed to make a bunch of these, and this is the general layout I wanted to do a whole bunch of photos. And the mask is animating along with my position in scale keyframes, so that if I bring up the title safe area by hitting the apostrophe key. I have a couple of position keyframes, a couple of scale keyframes. And how this works is I have a photo layer here. It animates over to basically half of the composition and I have some graphics right here. So this is a really simple example of a composition or I have a photo here. It's a lot easier than working with photos that are a different size and then adjusting the masks to be all the same size. So if you're doing a composition where you needed a bunch of elements that were about the same size for some kind of visual layout, this is another way that you can do it. All I have to do is just kind of move my guy in the bounds of this composition here. I don't have to worry about a mask, and messing with the position and the scale. And then to get the same exact kind of framing, all I have to do is move and scale the photo. If I duplicate this, and I double click on this skater mask too, I can take this photo, Delete it and then drop in another photo. And now If I wanted to duplicate this and slot in another skater photo, I can just find wherever I put this reveal composition in project. And that will make my comp the size of that region of Interest box that I just drew. And then I can come up here to Composition and choose Crop Comp to Region of Interest. Alternatively, you can grab this region of interest tool down here, and then you can just draw a box and often this is a lot quicker to do and get this to be just about the right size. And I can just change the width of the comp and I can pull that way down to something like that and then hit OK. So if I wanted a narrow cropping on this I could jump into the composition settings by going to the menu, > Composition and Composition > Settings or using the keyboard shortcut Ctrl+K. So for this example, this would be Skater Mask and then just set your composition to the size that you're ultimately going to use. Another way to think about kind of cropping in on your photos is to just create kind of a pre-comp. Another way to think about this is, if you were gonna use a bunch of elements that you wanted kind of vertical cropping for. I'm just going to delete that mask and kind of reset things. Pretty much that works with all layers is you can use a mask to kind of crop in on your layer. And that works with video layers, it works with shape layers. So that's one idea of kinda cropping your layers. And now when you grab these transform handles you'll be able to scale this layer and animate it much easier than without this lock checked. So one way you can avoid doing that, is to lock the mask, which you can do right down here, by clicking the lock right over here to the left of the mask. Because every time you put your mouse over a transform handle, and try and scale the layer, you're gonna end up grabbing the mask. But if you want to scale this visually, by just grabbing one of these transform handles you'll find that that's difficult to do. Now what you may find is if you're gonna be kinda animating this layer around, moving the position of it is pretty simple. I can adjust the mask to do that and it's pretty easy. So let's say I just wanted kind of a narrow cropping on this skater photo here. Now with the mask selected, if I double click on that, that will bring up these transform handles and I can just use that to make my mask smaller. With my layer selected, I can come up here to the rectangle tool, double-click on it and that will create a mask. Now hopefully just like you learned in the After Effects for beginners lesson on masks, we can do that with a mask pretty easily. So let's say for example, we have a photo here and we want to crop in on it. So I just wanna go through some practical examples of using masks and layer cropping and also changing the size of your composition, that can be pretty helpful for you in various ways. And something as simple as just cropping in on a photo or a video layer can sometimes be a little bit confusing because there are multiple ways to do it. So this idea of masks and cropping comes into play a lot in After Effects. In this lesson, you will learn a bit more about masks and cropping to see how you can crop composition size, photos and video layers inside of After Effects.
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