Select the keyframes, set the desired offset step(frames) and press the OFFSET button. There are additional options: Select the keyframes and click the MIRROR button. There is an additional option that lets you just mirror the selected keyframes instead of creating their mirrored copy. Note that the plugin mirrors not only the keyframes but also the easing graph. Home Page - https://aescripts.com/mirror-and-offset/ Mirror & Offset is a simple tool that does two things
1. Offset multiple keyframes across multiple layers with a single click
2. Create an exact mirrored copy of the selected keyframes across multiple layers
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