I make explainer videos and motion graphics using Anime Studio. As you know motion graphics have a lot of transitions and usually a lot of camera/workspace movement sometimes to explain ideas.
example: I have two scenes. Both with audio, a narrator, and the animations. I want to transition the scenes according to the two tracks of audio/narraration that I have for both scenes. Note: each scene i have saved in a different project folder. So that I can just paste them together in a video editor
Scene 1 - The narrator narrates the first scene and I make the animation according to the narraration.
Scene 2 - I am now doing a transition (example a zoom out of a thought bubble and scene 2 contains the person thinking of what I animated, inside the thought bubble is scene 1) to scene 2.
hope that makes sense.
So in this case I have a scene with in a scene. And the actual animation is actually more complicated because its a scene within a scene within a scene. Like a dream within a dream ...pretty much inception.

So what I do is take scene 1 go to file > save as > than name it scene 2. Than I go to where all the keyframes are from the ending of scene 1 (now saved as scene 2) I and go through each and every layer (which is a lot) freeze the pose and points to get the needed keyframes, copy and paste them to frame 1 and delete all the rest of the key frames that I don't need from the animation. Than I take and do the transition by zomming out that last animation which will now be contained inside the thought bubble and zoom out the scene to show a man sitting at a desk think with the thought bubble above his head which contained the previous scene.
Note: the reason why I don't want to put all the scenes into the same project is because they have a lot of assets(layers) and it makes it real complicated having a lot of crap outside of the project window and than moving it in to the scene one at a time. Because after that I actually have another transition so it is technically a scene within a scene within a scene.
The second way I have tried and done this is moving the whole channel (using the motion sequencer) to frame 1 to match up the keyframes I need and than zoom out (transition) the scene to scene 2. This one is a little more effective but still difficult to match up all the layers correctly.
So my question is, is there a way to move frame 0 to another specific part of the timeline rather than manually cut and paste and move keyframes? Or slide the timeline containing 'all' of the keyframes to frame 1 but not manually going through each channel on the sequencer and moving them to do so?
I really hope this make sense, or just typed up a lot of crap that no one can answer lol.
Any help would be appreciated.
Thank you!
I am currently at work but will draw a quick sketch of what I mean.

-McCoy