Adding text, changing the background, changing colour, correcting colour, removing bad shadows, fixing clothes, fixing hair, fixing skin, lighten/darken areas, motion effects, red eye repair, remove persons from group photographs, remove unwanted objects etc.
Special effects can also be added to the photographs, like focusing or defocusing parts of the image, softening portraits, adding perspective, correcting distortions, adding optical lens patterns, glows, glints, sparks and flares to produce dramatic effects.