The composition is your main work area in Descript. It is where you will edit and assemble — or even create — your content.
When you open a project, you’ll start with a single composition. You can create additional compositions in a single project, which is handy for creating multiple drafts or promotional clips; just select File > New composition.
Editing in a composition is non-destructive, meaning you can make changes to your media without permanently changing the source media.