Make sure the mask thumbnail box you want to invert is selected in the Layers Palette.
Then CTRL + I will invert the masking, and you will see this by the way black & white change places.
Thank You, That did it!!
Where the heck is that documented?
I searched Help and nothing.
Bob
You inverse a selection, you invert an image or mask.
I see both in Help under I in the Index.
I LOVE the Help files. And the manuals and books (both PDF and dead-tree variety).
I STILL refer to them and I’ve been an avid Photoshopper since version 2.5.1 (usually when answering questions here, to make sure I get all terminology correct).
Loads of good info there!