QTFred Interface FR: Layers
It'd be useful in certain missions, for example ones where you have multiple distinct stages or multiple waves of ships arriving from the same location, to be able to group ships into layers and show/hide them all at once rather than just hiding ships one by one.
Isn't this what the existing Groups menu option does (at least in MFC FRED)?
I suppose it might be. They're presented in a place and format that made them not really register to my mind when I wanted this, so I guess the real FR here would be to mimic more familiar layer UIs for the feature.
FRED's groups is about selection not display/hiding. I may have a go at this because I would find it useful.