Submodule 11.1: Gimp file- Selection tools
Create and Save a Gimp file
You can recognize a GIMP Image file by its extension, .xcf . The extension abbreviation stands for eXperimental Computing Facility. GIMP uses these files to store layers, transparency settings, paths, and other information associated with one or more photos.
See the Gimp documentation: https://docs.gimp.org/en/