Keeps your animation timing intact during the transfer.
Click on the pre-composition layer in your main timeline that you wish to dismantle. Run the Script: Go to Window > Un-Precompose.jsx .
A guide on for large projects?
Manually adjust the "In" and "Out" points to match the previous pre-comp container. Re-link any expressions that broke during the move.
Once installed, using the tool is incredibly straightforward: Un Precompose After Effects Plugin Free Download
A small dialog box may appear asking if you want to keep the pre-comp's attributes (like effects or masks) applied to the extracted layers.
Moves all layers from a pre-comp back to the main timeline. Keeps your animation timing intact during the transfer
You simply select the pre-comp layer, run the script, and the layers appear exactly where they should be. How to Download Un-Precompose for Free