RED MASK This is just a simple way to see what you are adding or removing when a layer mask has been applied.
After the mask has been applied press the Reverse Solidus or Backslash [PC] it fills the picture with a transparent red, when you paint, it shows where you have been, but I guess you all know this lol
Martin
--- One to one workshop in monochrome, from capture to fine art print, printing service available