To manually adjust brightness and contrast:
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 Brightness/Contrast tab.
Drag the Brightness slider to the right to make the image lighter. Drag the brightness slider to the left to make the image darker.
Drag the Contrast slider to the right to make the dark areas darker, and light areas lighter. Drag the contrast slider to the left to make the dark areas lighter, and the light areas darker.
To view the adjustment on the original image without exiting the 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