Autolevel improves brightness and contrast in most photos, and can be used to bring out the color in underexposed pictures.
Autolevel does not make new adjustments each time a picture is loaded.
Occasionally Autolevel does not improve the appearance of a picture, and may need to be switched off.
to reverse the red eye effect caused when flash is reflected back by the retina of the eye.
and draw an ellipse round the affected area.
Increasing saturation enhances the intensity of colors, for instance to make pale skin tones appear ’warmer’.