Jeff,
Thanks a bunch. Perfect answer. Exactly what I was asking about/needed.

Thanks again,
Chappy

SU seems to perform some sort of calculation each time I attempt to zoom, based on what is currently in line with the mouse pointer, such that when I point at a model solid or face, the zoom is quite appropriate and rapid. However, when I have the mouse pointer pointing ever so slightly to the side of a model solid or face, i.e. into SU's version of infinity, the zoom is so slow as to be nearly imperceptible. Is there a setting (or keyboard shortcut) that causes SU to zoom at a fixed rate, i.e. for every 1" of movement of my two fingers on my trackpad, SU will "rotate the camera lens" a fixed amount?

I would like to know how to get SU to display my models in a natural view, i.e. as if the model was real. Specifically, I want to eliminate all the hidden lines that SU seems to insist on displaying. I'm not talking about hidden geometry. I'm trying to get rid of the dashed lines on the screen which indicate a line that exists in my model but is obscured by some solid more in the foreground.