Refining a selection in the Quick Mask mode

In this movie, we'll evaluate the selection that we created in the…previous one, and then we'll refine it inside the quick mask mode.…So assuming that you went ahead and saved your selection as…an alpha channel, make sure you're seeing the channel's panel on…screen, and then click on that alpha channel, which I call…base selection And you'll see your selection outline represented as a mask.…So anywhere you see a white pixel, that's 100% selected pixel.…Anywhere where you see a black pixel, that pixel is 0% selected…and any shade of gray is some degree of selection in between.…

Now you might ask, well, does that mean that a…selection outline is resolution dependent the way the image is?…And the answer is yes.…Each and every pixel has a selection value associated with it.…Now to put the mask in play, you need to convert it back to a selection outline,…and you do that by pressing the Ctrl key, or the…Cmd key on a Mac, and clicking on that alpha channel.…And that goes ahead and selects each and every pixel based on its luminance.…