Duplicate and Invert a Layer Mask
To duplicate a layer mask to another layer, and invert it at the same time; press-and-hold Alt Shift (Mac: Option Shift), then click-and-drag the layer mask thumbnail to any other layer.
To duplicate a layer mask to another layer, and invert it at the same time; press-and-hold Alt Shift (Mac: Option Shift), then click-and-drag the layer mask thumbnail to any other layer.