Sorry, but thanks for the replies
Have to say I find trying to read Apple's help notes (as opposed to a hard copy) quite tiresome for somebody who has become used to Mr Gate's mollycoddling. I'd also add that I printed off all the help notes for iMovies and I'm still struggling in some areas.
Probably just me, but I have formed the clear impression that the Mac is a wondrous, well-integrated tool - but they do seem to expect you to be a geek as well.
Removes thick framed glasses....