You're right. Just had a search round online (I'm not home at present), and it does seem to be the 'Normal' view that caused my problem, which, without the add-in you've shown me, is the default view. It appears that 'Slide' view is, as you said, the same as in '97.

'Normal' view does not exist in PowerPoint '97, which is what caused my confusion.

Thanks again, Steve.