Flatten Layers

压平图层

This command merges all the layers to form a single layer. Invisible layers are deleted in the process and any transparent areas in the flattened layer are filled with white.

这个命令合并所有的图层形成一个单一的图层。在这个过程中，不可见的图层会被删除，而在被压平的图层中，任何透明的区域都会被白色填充。