A Photo Group or a Clipped Photo Group is created in one of three different scenarios.
- Applying a clone to a photo
- Applying a red eye to a photo
- Enhancing a masked area of the image via one of the Mask/ Region tools.
- Apply a Color select/erase
This allows the photo along with its alterations (red eye, enhance or clone operations) to be selected as one object
You can disassemble a Photo Group into its constituent objects by using the normal Ungroup function (Ctrl+U).
You can select the 'edit shapes' that are inside the group by using the normal Select Inside (Ctrl click) or using the Page & layer gallery to view and select the items within a Photo Group.
You can 'flatten' a Photo Group to become a normal JPEG by selecting the Photo Group and the menu Utilities -> Optimize Photo...