Right-click on the layer in the layer gallery, and chose 'New Mask Layer -> From Image.' Then select 'Invert Mask Data' in the window that pops up.
You can then draw on a layer under the one...
Type: Posts; User: David O'Neil; Keyword(s):
Right-click on the layer in the layer gallery, and chose 'New Mask Layer -> From Image.' Then select 'Invert Mask Data' in the window that pops up.
You can then draw on a layer under the one...