When creating animations it USES four types of layers: vector graphics, bitmap, sound and camera.

它用四种类型的图层来创建动画：矢量、图形、位图以及声音和照相机。

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To create the mask click on the Add vector mask button at the bottom of the Layers Panel.

要创建蒙版，需点击图层面板下添加矢量蒙版按钮。

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Layers of raster data are more often called bands, although the term layer still applies to raster as well as vector data.

光栅数据的层通常称为段，而术语层仍然用于光栅和矢量数据。

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