Tonal Correction layer (Posterization)

Select the [Layer] menu > [New Correction Layer] > [Posterization] to create a layer that allows you to adjust the posterization.

·For details on how to create a Tonal Correction layer, see "Creating a tonal correction layer". ·For information on how to edit a Tonal Correction layer, see "Changing the area of a tonal correction layer". ·For information on the settings in the [Posterization] dialog box, please see the following section.

[Posterization] Dialog Box

(1)  Number of gradients

Set the number of levels to split the image values into. You can set between 2 and 20 levels. More levels will result in a smoother effect.