I need to:
- add an image
- make changes to that image, like adding markers, lines, notes and labels
But I need to be able to move them and update them in subsequent sessions.
Obviously, the JPG (or other format) would be the format for output, but a Gimp file format must retain these object details in the file itself so they can be saved, then updated.
How do I do this with Gimp for Mac?