Enhancing a mask with Apply Image

In this exercise I'll show you how to restore the skin tones inside of this…alpha channel using the Apply Image Command.…I've saved my progress as Alternate Subtract mass.tif found inside the…01_calculations folder and I have this final alpha channel selected as you can see here.…I am going to make a couple of copies of it, so that we can compare and contrast…the behavior of Apply Image.…So I'll start by dragging the channel onto the page icon, and I'll go ahead and…rename this new channel Add Red, because we'll be adding the Red channel and…I'll explain why in just a moment.…

Now I am going to duplicate this channel again by dragging and dropping it onto…the page icon and I'll call this guy Add Red within Red and you'll see why that…is in just a moment.…Now here is why I am going to add the Red Channel.…If I switch over to the Red Channel you can see that it's very bright where the…skin tones are concerned.…So it makes the most sense to grab those skin tones and add them to the existing mask.…