Thanks for asking Jaira!
A reverse feature is on our todo list already – so it will come in one of the next alpha releases.
But for now, I would just copy/paste the drawings one by one. Not using the lasso, but copy the whole drawing (frame). Just click it in the X-Sheet (or flip to it) and hit Ctrl C (or Cmd C on Mac). Go to the frame you want to insert it and hit Ctrl V (Cmd V on Mac).
You’ll see that the copied drawings are tintet light brown, which means they are clones of (connected to) their respective originals. So when you adjust, clean up or color your original drawings, your clones will automatically update.
Let me know if this makes sense and if it helped at all?