Yes apologies, ArcGIS Online webapp builder.
Not sure what you mean? What should I see when I hold down the shift key?
I currently have it set up where all the layers are turned on in each group layer but the group layer itself is turned off. Once I turn on the group layer all layers that belong to it display. I'd like a tool on the map which turns on group layer as opposed to going into the layers list.
Thanks for the help!