Yes, that was the only way I knew to accomplish this but I was curious if there was a “pad” type functionality that would automate this.
Maybe I just need a couple pointers on this technique.
My method is to select all keyframes like you said. Then I move the current frame indicator to where I want the first keyframe to start, then I shift drag the first keyframe to snap to the current frame indicator. All the others move relatively since they are all selected.
However, I then have to go into all the nested comps and perform the same steps. I was curious if I was missing an easier way to do this.