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Precomps and bounding box size

New Here ,
Apr 20, 2024 Apr 20, 2024

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Thank you for your help with this. I'm new to AE and trying to learn some simple animations, like text bubbles appearing on screen. In the picture below, I have a Text Layer (God), and white Text box formed with a shape layer, and an image layer (drawing of God — no offense to anyone of religious persuasion, Ty). I'm trying to make these 3 layers behave as one so I made a precomp. I'd like that precomp to follow a very short curve, the way arriving text does on our phones. To do that, I created a path line as a shape layer and pasted the position data into the precomps position data. It works but it's a bit clunky. My issues is that the size of the 'bounding box'  for the precomp is way larger than the images as they appear on screen. That makes it hard to set the precomp to follow the path. I tried moving the anchor point in the precomp far closer to the images, but it'd be better to have a smaller bounding box to do this with. Can I change the bounding box size. In the image below, the bounding box for my text is purple. See how big it is. I know there are videos online for how to create this animation, but I'm trying to get it on my own as a way to learn. Any insights to the bounding box issue (or better ways to do this - 'parenting?') are very welcome. Thank you! 

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LEGEND ,
Apr 21, 2024 Apr 21, 2024

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You can change the composition settings after the fact using the respective menu option.

 

Mylenium

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New Here ,
Apr 22, 2024 Apr 22, 2024

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Thank you for the reply!

 

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Community Expert ,
Apr 21, 2024 Apr 21, 2024

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The dimensions of a precomp (when made from multiple layers) will be taken from the dimensions of the parent comp it was made in. 

To change teh dimensions of a precomped layer:

1. In the Timeline, double-click on the precomp layer to open it in the Timeline/Comp panel.

2. With the precomp open choose Comoposition > Composition Settings and then change the dimensions in the dialog box.

 

Alternative way:

1. In the Timeline, double-click on the precomp layer to open it in the Timeline/Comp panel.

2. Locate the "Region of Interest" button, it's located at the bottom of the Comp panel.

3. Click and drag the region of interest around the are of the comp you want to keep. It works kind of like. acrop tool.

4. From the menu bar, choose Composition > Crop Comp to Region of Interest. 

 

NOTE: When you return to your main composition the comp will have shifted position. This usually happens when resizing nexted comps (precomps).

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New Here ,
Apr 22, 2024 Apr 22, 2024

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 Thank you very much. The second option sounds spot on. I’m trying to learn how to ‘group’ layers so parameter changes to 1 layer will be performed by selected layers. I guess I could copy keyframes from one layer to another but that seems slow. I know about precomps but, if my memory serves me correctly, linking/grouping/ganging via Nul objects may be another way.  Is that correct?  I’ll poke around there too. Many thanks for your help! 

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