This is a great question and my mind is tickled by a faint memory from over 25 years ago when phone books had header/footers showing breadcrumbs to the first three letters of previous and trailing surnames. I'm pretty sure that concept was the example used to introduce me to StyleRef fields in headers.

I'll do a search to see what I can find. There may be a way to do this but I just can't think of what it might be.

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Andrew Lockton
Chrysalis Design, Melbourne Australia