Well, that was certainly interesting. I never knew that, and I've been making successful DVDs for years now without knowing it, so I wonder when it comes into play. When I did the "math" to calculate my offsets for my thumbnails I was able to get it exactly where I wanted to. But you don't need to try to explain it at this point.
I do have another question though, about the timeline. Up where the time numbers are, I have part shaded in a light gray and part in a dark gray with a little vertical bar where the color changes. I can drag that bar left and right and move the light and dark gray areas but I have no idea what that is doing. That I would like to know. I tried searching on colors and timelines but couldn't find anything. I also see a very thin red line and very thin red - or maybe it's orange - line underneath the gray areas. What's that trying to tell me? Everything seems to be working fine. I just put transitions on the photos. I don't know if that generated those colors on the timeline or not.
Thanks again.
Rick