In 2.8 at least, turning on and off groups of layers is a single click on the "eye" icon of the layer group: http://docs.gimp.org/2.8/en/gimp-layer-groups.html

In 2.8 at least, turning on and off groups of layers is a single click on the "eye" icon of the layer group: http://docs.gimp.org/2.8/en/gimp-layer-groups.html http://docs.gimp.org/2.8/en/gimp-layer-groups.html