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Chapter 10. Creating Layer and Channel M... > Creating Channel Masks from Selectio...

Creating Channel Masks from Selections

Creating Channel masks from scratch (using paintbrush and drawing tools) is a useful feature, and gives you the ability to create a mask in any desired size or shape. However, there are times when it would be easier to first define the areas you want to save, and then create the mask. When you create a Channel mask from an existing selection, Photoshop uses the selected areas to create the mask. For example, you have an image of a woman wearing a red dress, and you want to change the color of the dress to green. The first step would be to select the red dress. Rather than create a new mask, and paint out the area representing the dress, it would easier to first use a tool like the Magic Wand, select the dress, and then convert the selected area (the dress) into a Channel mask. Once the mask is created, you could fine-tune the mask, using Photoshop's painting tools, and then change the dress color. Whether you create a mask from scratch or choose to create one through a pre-defined selection depends on the image, and what you're trying to accomplish.

Create Channel Masks from Selections

Open a document.

Create a selection using any of Photoshop's traditional selection tools.

Select the Channels palette.

Click the Save Selection As Channel button.

Photoshop creates a new channel mask based on the selected areas of the document.



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