Changing the Flow Opacity to 0% (zero) in Photoshop CS6
Just as tapping 00 (zero-zero) in Photoshop CS6 will change the Opacity of a layer to 0%, adding the Shift key will change the Fill to 0%. Note: this shortcut works only if you have a tool selected that doesn’t have an Opacity or Flow setting – for example, the Move or Lasso tool. If you have a tool selected that does have an Opacity and Flow setting (like the Brush or Clone Stamp), then using the numeric keys changes the Tool options, not the Layers panel options.
