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The following key commands do not require clicking on the mask.
X reverses Foreground and Background colors Numbers number keys change the Opacity of a brush [ and ] makes a brush smaller and larger Shift [ and Shift ] makes a brush softer and harder Opt Delete fills a mask with the Foreground color Command I inverts a mask
The following key commands require clicking on the mask.
Control Click displays mask options Opt Click displays a mask in black and white Shift Opt Click displays a mask as a red overlay
Command Click loads the mask as a selection Shift Command Click adds the mask to a selection Option Command Click subtracts the mask from a selection Shift Option Command loads the intersection of two masks Shift Command I inverses a selection
Drag & drop to move a mask from one layer to another Option drag & drop to copy a mask from one layer to another
Edge masks target only the contours in an image. (Think of edge masks in Photoshop as the creative sharpening equivalent to the Masking slider in ACR or Lightroom’s capture sharpening.) They keep smooth areas smooth, while accentuating the contrast/sharpness of contours. They can be particularly useful for images that contain moderate to significant amounts of noise. In many cases, they allow the use of more aggressive applications of sharpening effects. Edge masks can help you take all of the creative sharpening effects you design up a notch – or two.