Copy & Paste Keyframes Across Multiple Layers
Hello Beta users!
In the latest Beta builds of After Effects, you are now able to copy and paste keyframes across multiple layers. This new functionality is available in After Effects (Beta) 24.2.0.38 or later. We have been working on this feature for quite some time and are very excited to share it with all of you!

We know this functionality is highly requested, so we'd love to hear your feedback.

