Anything but change the geometry itself, add a new morph as a new targetGeom, or add a prop or hair. But as for the figure itself, if Poser can change it in a CR2, a pose file will do it. Any variable is open the change by using a pose file. And - say you had a character face and you would like to keep it in Face instead of Pose, but you want to add trans data for the eyes with it? The only difference between a pose file and a face file - as far as what they can do when you click it? Is that one ends in .pz2 and must be in Pose and the other ends in .fc2 and must be in Face. You can put a full blown pose file in Face and it will work the same - as long as you change the extension.