To Adjust Brightness, Contrast, and Fade of an Image
Click Modify > Object > Image > Adjust.
Select the image to modify.
In the Image Adjust dialog box, to adjust brightness, contrast, and fade, use the appropriate slider or enter a value.
The default value for both brightness and contrast is 50. You can adjust to a maximum brightness of 100 or to a minimum of 0. The default fade value is 0. You can adjust to a maximum fade of 100.