In the 2D editor you're able to select through "special" if the object is flying or in formation or in cargo or just plain old none.
This feature has since been removed in the eden editor and since, well I heard that you guys are removing the 2D editor that this may break a lot of things. (well personally since I have a lot of missions start off with planes or helicopters flying, which in eden just makes them fall straight into the ground instead)