Editing and exporting a Field Blur mask

Field blur and the other blur gallery…filters work their magic by automatically generating masks.…So, imagine if you will that field blur is actually…applying a homogeneous amount of blur across the entire image.…Everything that's not blurred Is protected by a mask.…In this movie, I'll show you how to view that mask, how to modify…it, how to export it to the Channels panel, and we'll also do a little…manual masking of our own in order to create this final version of the effect.…I'll go ahead and switch back to the image in progress.…

And I'll double click on Blur gallery in order to bring up the Blur gallery window.…And what you want to do to view the mask is press and hold the M key.…So as long as the M key is down you can see the mask as we're seeing it here.…And as soon as you release the M key you hide the mask.…You can also…tap the M key in order to keep the mask up on screen.…You're going to have to tap very quickly, by the way.…And then if you tap the M key again you'll switch back to the full color image.…