"Set as thumbnail" from photo mode from a creation you own

The most common use case for creators using photo mode on their own creations is to simply set it as the thumbnail for the creation. At the moment, we need to save it (using up storage, and photo slots), exit edit/play mode, edit the cover appearance, set the background, and choose the photo we just took.

It would be great if we could just skip straight to setting it as the thumbnail in some way--maybe have a button take us straight to the "choose a BG" screen, with access to the photo we just took.