ming, I said some prefer a scientific approach... not that that is the approach we were taking, though 3D in general is a bit visual and scientific, depending on your perspective. I use a trackball, and am quite fond of it actually... though I admit, I'm not sure if that is what you mean. I'm still not quite sure what "it" is, that you're refering to. As you'll notice from my previous post, I describe two different controls... I'm not sure which you're talking about, and your response can be construed to imply either of the two. Its apparent you took my words as an insult. As I stated previously, I did not intend to insult you and even tried to clarify my meaning. I'm sorry you read it the way you did. That is the last I'll say on the subject, as it seems niether of us intend to budge. -Rob