Channel > Shift Channels effect

The Shift Channels effect replaces red, green, blue, and alpha channels in the image with other channels. In Take channel From, specify which channel to use as a source.

Note: You can use this effect to display the alpha channel for a layer if you set the RGB channels to Alpha and set the alpha channel to Full.


Original (left); with Take Alpha From set to Blue and Take Red, Green, and Blue set to Alpha (center); and with Take Alpha From set to Alpha, Take Red From set to Green, Take Green From set to Lightness, and Take Blue From set to Full Off (right)