User`s manual

Reference: The Advanced Image Correction tools 89
Appearance of curve if
Method chosen is "Line"
Instead of dragging the Gamma handle, you can also directly enter the appropriate
Gamma value in the edit box. Dragging points on the curve to a Gamma value
above 1.00, will lighten the dark tones. Dragging points on the curve to a Gamma
value below 1.00 will add shadows to light tones
Appearance of curve if Method
chosen is "Gamma"