Here’s a little trick that works with earlier versions of Bryce and may relate to this topic…I’m using 5.5, don’t know if it still works with the latest versions. after introducing several primitives and resizing, rotating you can then hold down CTRL + ALT with the cursor over any of the little vertices until the cursor comes back as “(1)” and LMB click and the object will come back the way it was brought into the scene.