7.14. Перейти на нижний слой
With the command, you
can make the bottom layer in the stack become the active layer for
the image. It is then highlighted in the
Layers dialog. If the bottom layer of the stack is already the active
layer, this menu entry is insensitive and grayed out.
7.14.1. Активация команды
Or you simply click on the layer name in the Layers Dialog.