Greg, During a demo at the "visualization of large complexes" workshop that Tom Goddard and I attended this weekend, I tried to zoom in close to a single protein within bluetongue virus. But what happened was that the eye position ended up behind the yon clipping plane, and the virus particle suddenly shrunk to a tiny dot. It was not easy to get back to the previous display without opening a command line window and doing a "reset." Can't 'unreasonable' eye positions be prohibited within sideview? --tom