As you can see in the Layers Panel, the Background layer has a lock icon next to it.

当你看到图层面板的时候，背景图层右侧有一个锁的图标。

youdao

As you can see in the Layers Panel, the Background layer has a lock icon next to it.

当你看到图层面板的时候，背景图层右侧有一个锁的图标。

youdao