Levels

Levels is a Colour effect.

OriginalLevels

What it does

Levels lets you adjust the black/white point and gamma through a UI, or adjust values directly. You can adjust these values per channel, including alpha.

Parameters

Parameter	Control	Range	Default	Unit
Master › Input black	Slider	0 to 1; any value by typing	0	-
Master › Input white	Slider	0 to 1; any value by typing	1	-
Master › Gamma	Slider	0.1 to 4; down to 0.01 and higher	1	-
Master › Output black	Slider	0 to 1; any value by typing	0	-
Master › Output white	Slider	0 to 1; any value by typing	1	-
Red › Input black	Slider	0 to 1; any value by typing	0	-
Red › Input white	Slider	0 to 1; any value by typing	1	-
Red › Gamma	Slider	0.1 to 4; down to 0.01 and higher	1	-
Red › Output black	Slider	0 to 1; any value by typing	0	-
Red › Output white	Slider	0 to 1; any value by typing	1	-
Green › Input black	Slider	0 to 1; any value by typing	0	-
Green › Input white	Slider	0 to 1; any value by typing	1	-
Green › Gamma	Slider	0.1 to 4; down to 0.01 and higher	1	-
Green › Output black	Slider	0 to 1; any value by typing	0	-
Green › Output white	Slider	0 to 1; any value by typing	1	-
Blue › Input black	Slider	0 to 1; any value by typing	0	-
Blue › Input white	Slider	0 to 1; any value by typing	1	-
Blue › Gamma	Slider	0.1 to 4; down to 0.01 and higher	1	-
Blue › Output black	Slider	0 to 1; any value by typing	0	-
Blue › Output white	Slider	0 to 1; any value by typing	1	-
Mix	Slider	0 to 100	100	Per cent
Blend	Dropdown	Normal · Darken · Multiply · Colour burn · Linear burn · Darker colour · Add · Lighten · Screen · Colour dodge · Lighter colour · Overlay · Soft light · Hard light · Linear light · Vivid light · Pin light · Hard mix · Difference · Exclusion · Subtract · Divide · Hue · Saturation · Colour · Luminosity	Normal	-
Matte	Layer	Any layer in the composition	None	-
Invert	Checkbox	On or off	Off	-
Channel	Dropdown	Luminance · Alpha · Red · Green · Blue	Luminance	-

In the Effect Controls panel:

• Master groups Input black, Input white, Gamma, Output black, Output white.
• Red groups Input black, Input white, Gamma, Output black, Output white, and starts closed.
• Green groups Input black, Input white, Gamma, Output black, Output white, and starts closed.
• Blue groups Input black, Input white, Gamma, Output black, Output white, and starts closed.
• Matte is an input to an effect, scaling the strength. Invert inverts the mattes for calculating strength.

What each control does

• Input black: the input value that comes out as Output black. Raise it to crush blacks.
• Input white: the input value that comes out as Output white. Lower it to blow out highlights.
• Gamma: same as Gamma.
• Output black and Output white. Raising Output black raises the black level; lowering Output white reduces the white brightness.
• Master applies to all three channels, while Red, Green and Blue apply to individual channels.
• Mix: how much of the result replaces the original.
• Matte and Invert drive the strength of the effect from another layer’s brightness; see Effects.

Related

• Curves
• Gamma
• Exposure
• Scopes
• Colour
• Effects