import it twice... hold the first one still as long as you want and then use
the second one for the pan/zoom... remove the default transition between the
two and set the starting position of the second one to be the same as the
ending position of the first.
Many thanks, I was working round to this solution but hadn't quite got there.
I think the Help file, which is basically excellent, coul be expanded a bit,
wih a few more editing tips and tricks!