Canon MP490 series On-Screen Manual page 324

Note
The shooting date is printed according to Date display in Device settings.
2.
Auto photo fix
When Auto photo fix ON is selected, the scene or person's face of a shot photo is recognized
and the most suitable correction for each photo is made automatically. It makes a darkened
face by backlight brighter to print. It also analyzes a scene such as scenery, night scene,
person, etc. and corrects each scene with the most suitable color, brightness, or contrasts
automatically to print.
Note
As a default, Auto photo fix ON is applied when photos on a memory card are printed.
When Auto photo fix ON is applied, you can specify only (3) Red-Eye correction below.
If the print result with Auto photo fix ON selected is not satisfactory, select Auto photo fix
OFF, then specify (4) to (12) advanced setting items below.
3.
Red-Eye correction
Corrects red eyes in portraits caused by flash photography.
Depending on the type of the photo, red eyes may not be corrected or parts other than the
eyes may be corrected.
Note
This setting is available even if Auto photo fix ON is selected.
4.
Vivid photo
Makes green and blue more lively.
5.
Photo optimizer pro
Automatically optimizes brightness and tone of a photo.
6.
Noise reduction
Reduces the noise on blue areas like the sky as well as on black areas.
7.
Face brightener
Brightens a darkened face on the photo taken against the light.
8.
Image optimizer
Corrects and smoothes the jagged contours for printing.
9.
Brightness
Adjust brightness.
10.
Contrast
Adjust contrast.
11.
Color hue
Adjust color hue.
For example, you can increase red or yellow to adjust the skin tone.
12.
Effects
Applies special effects to the photo, such as printing in sepia tones or with a sketch
illustration like effect.