I think it's a quite straight forward request. For example, in my Take off your T-shirt storyboarded map, it would be very convenient to lock, for example, awp's head to awp's body. They are two separate images since awp's head changed throughout the map while his body stays the same. If images could be locked in the SBE, it would save a lot of time moving/scaling one or the other rather that having to do both and make sure they align properly. I don't mean this to be a selfish feature, I'm sure it will come in handy other places too. This map was just an example.