Either I'm a bit thick for not being able to work out how to do this or I'm the only one that thinks that this is would be a very useful thing to be able to do.
I want to find/change text in multiple instances all at once, but only on a page range, not the whole document. If I can't do that being able to limit it to one page would work. I realise I can move the pages in question to a new document, do it there and then move it back but that seems a rather 1990's solution!