Restricting blending to channels (Photoshop)

You can restrict blending effects to a specified channel when blending a layer or layer set. By default, all channels are included when blending a layer or layer set. The channel selections vary based on the type of image you are editing. For example, if you are editing a RGB image, the channel choices are R, G, and B. If you are editing a CMYK image, the channel choices are C, M, Y, and K. (See About color channels.) When using an RGB image, for example, you can choose to exclude the Red channel from blending; in the composite image, only information contained in the Green and Blue channels are affected.

To exclude channels from blending:

1. Double-click a layer thumbnail, and do one of the following:
• Choose Layer > Layer Style > Blending Options,
• Choose Blending Options from the Add a Layer Style button at the bottom of the Layers palette.

Note: To view blending options for a text layer, choose Layer > Layer Style > Blending Options, or choose Blending Options from the Add a Layer Style button at the bottom of the Layers palette menu.

2. In the Advanced Blending area of the Layer Style dialog box, deselect any channels you do not want to include when the layer is blended.

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