I got the keyframe thing to work! Thanks, optodata! And thanks to Hankster65 for trying it out. His screenshot was very helpful in getting me pointed in the right direction.
Something odd happened when I was working with the transitions. I somehow ended up with two clips on top of each other, in the same "row" (timeline, or whatever the name is). If you click on one, you can see it extends beyond the other, and vice-versa.
Sort of like this (but all on the same row):
-------------------------------------------------------------+
| -------------------------------------------------------|----- |
| |
__________________________________________________________ |
How did that happen? I've tried all sorts of ways to create it, but can't reproduce the effect.
It's the only place where the transition effect worked (shove). Anyplace else I put shove, it just slides in a black screen.
Thanks,
Paul