Split Channels: Layer Blending

There is another method of blending channels that offers additional controls. Starting with the RGB original, go to the Channels palette, click the Options triangle in the upper-right corner to get the drop-down menu, and select Split Channels (Figure 5.7). This will “split” the RGB file into three separate grayscale files and name them according to the channels from which they originated. You can drag one file on top of the other to create a layer stack that you can use to blend the channels (Figure 5.8).

Figure 5.7 Select Split Channels from the flyaway menu at the upper-right corner of the Channels palette.

Figure 5.8 To ensure that two images will be registered, hold down the Shift key when dragging one document onto another.