What is the layer mask?
Layer mask is a kind of can withdraw part of the hidden layer of the tools, compared with permanently erased or delete part layer, the layer mask allows editing more flexible, layer mask in the composite image, cutting object used in other files and restrictive on part of the layer is very useful in the editor,
You can be added to the layer mask, black, white or grey, one of the methods to daub is on the layer mask,
White is completely that contains the mask layer,
Black will hide contains a mask layer, make the content of the layer of transparent, according to the content of the lower layer
Gray gray will hide part contains the mask layer, the layer is translucent, and the content of the layer below the loom,
Those few words how to understand? We create a new file, first add a color to the background layer, convenient we observed (3813 c2/FF6FD8), then add another color to the upper layer, add a template to the upper layer, to the upper layer in the template to add a black and white gradient, we look at how the mask is transparent,



We take a look at the layers panel, two layer's color is still not changed, in the layer mask, here, in the layer mask is white on a black gradient under the condition, the color of the white area shows the upper, and black areas though color is the same, but the top of the image is clear, let the lower color display, so we have seen in a workspace is a gradient effect,

If we give the upper layer filling a gray mask, the grey is translucent state, when the content of the layer below the layer is like concealed, the color of what we see is, the effect of two layer color overlay,

So how to understand the layer mask, can only use no color - black (transparent), white (not transparent) and its transition in the middle of the color, gray (translucent) filling,

We have to add a layer mask green

See not, no matter how we add, when we click on the layer mask, it will become a gray

Layer mask of black and white ash is a state of whether cover, no matter what color you add him, mask will be different according to colour lightness to display different levels of gray,
Will add white to the layer mask that contains the mask layer, you can use white daub on the layer mask, to show with black before you hide, the content of the
According to the X button in the toolbar switch foreground and background colors, make white foreground color,
Hidden areas to daub on the image, this will add white on the layer mask, the mask layer to display the corresponding area,