Creative Effects > Colour Corrector > Colour Correcting >
Adjusting the Gamma

You can adjust the grey values of an image by adjusting the gamma. This allows you to brighten or darken an image without greatly affecting the shadows or highlights.

To adjust the gamma of the image:

1. Select the tonal range you want to modify.
2. Click a Gamma field and enter a value. Lower the gamma value to increase the contrast or raise the gamma value to decrease the contrast.