8-2 Initial knowledge of masks

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Masks are used to hide portions of a layer, avoiding the direct deletion of layer content. And if it is deleted, it will not result in the return of the history record.

Understanding: The glass can be understood as a transparent version of the glass version. The act of putting glass on a picture can be called a mask. Affixed with glass is also covered in glass version, is the mask. Thus we get the first impression of the mask, which uses a layer of masking layers above the layer to achieve the purpose of masking (that is, hiding) portions of the layer.

Basis:
Masks are used to mask (that is, hide) the contents of a layer, and when you need to delete an image of an area in a layer, you can use a mask to do so. Masks do not break the image and provide more post-modification space. It can be of any shape.
Masks work on a single layer, and different layers can use different masks. A layer can have only one mask (additional knowledge when learning the path later).

Layer _ Layer Mask _ Hide Selection

Masks and channels indicate that the area is a selection. Black indicates not a selection, is an invalid area

8-2 Initial knowledge of masks