| Keyboard Shortcut | Menu Shortcut | Menu Location |
| Ctrl+G | Alt+I, G | Image -> Gamma |
The Gamma command adjusts the apparent brightness of the image.
Activate the Gamma command. Move the sliders to adjust the image’s gamma, and press OK when done.
Correction
Adjust the value or move the slider to increase or decrease the Gamma correction for the image.
Enable Real-time Preview
Check this box to preview the results as you make adjustments to the slider.