I just check i have the prop selected and then hit delete on my keyboard. A prop should be a prop when it is simple enough that it shouldn't need more than movement on the 3 axis and scaling. Anything more than that and it may be best to be a figure. Its a little more complex than that, as a prop is easier parented than a figure, so if say you wehere creating a sword then you'd build it so it would fit into the figures hand, so you'd import, texture and parent to the hand, then add to library, then every time you added it to the scene it would auto fit in the hand no matter where the hand was, to do that with a figure it would need to conform, or you'd need to postion and parent it every time, to much work with no benefit......Steve