To manually adjust saturation:
On the Browse tab, click the album to display thumbnail views of the images in the album in the Album View window.
In the Album View window, double-click an image to open it in the Image View window.
Click the down-arrow on the Adjust button and choose Adjust, or choose Image > Adjust to open the Adjust dialog and then click the Saturation tab.
Adjust the slide controls to change the purity of the hue.
To view the adjustment on the original image without exiting the Image Adjust dialog, click the Apply button.
When you are finished making adjustments to the image, click OK, or to make another adjustment, click the tab for the adjustment that you want to make.
Fixing Images Using the Adjust Wizard