The Sponge Tool saturates / desaturates image areas:
- In the Toolbox, select the Sponge
Tool.
- Choose brush size and style*.
- Select mode (what do you want - saturate or desaturate).
- Set the tool's Flow (tools strength).
- Drag on the image.
Click to enlarge
* More about choosing
brush.
About the Author:

Since 1999, Andrei has run the digiCollage – an online image editor's shop. Having edited all kinds of customers' images, he has vast Photoshop experience that he willingly shares with you in this course. You are invited to look over an expert's shoulder and see Photoshop in action.