Apply animation from one layer to another

[sparklekins]

I have a text layer in AE 2018 that has animation keyframes applied to it - basically the text changes shape and resizes itself over a period of a couple of seconds. There a 4 keyframes in this animate layer.

I want to add a solid colour box behind the text to help it stand out on the screen, and I want the box to resize as per the text layer. Is it possible to somehow 'connect' the shape layer to the text layer so it inherits its animation - or do I have to copy the animate keyframes to the solid box layer?

Thanks!

[Dave_LaRonde]

Before the animation begins, make a shape or a solid.  Position it behind the text.  Parent it to the text layer.  Done.

[sparklekins]

Hi Dave - I tried that but it didn't work. I wonder if this is because the text layer has 'Animator' effects applied to it?

I'll keep playing around and see if I can do it.

Many thanks.

[Roland Kahlenberg]

If you know how to create an Expression (it's as simple as holding down the ALT key while clicking on a property's Stopwatch icon) then the answer lies in using the sourceRectAtTime Expression method.

Take a look here - https://www.momographics.co.uk/more-momo/2017/5/26/textbox-resize

[Roland Kahlenberg]

Parenting only works with Transform properties (except Opacity). Animation created using Text Animator properties will not transfer over via Parenting.

[Mylenium]

I wonder if this is because the text layer has 'Animator' effects applied to it?

Yes, it is. To do what you want you would have to use the sourceRectAtTime() expression or simply animate the square manualyl to match.

Mylenium