automatic modification in several pages

Is it possible, and how ? Thanks

Page A contains an extract of page B

I modify page B

I want that extract of page B in Page A follows automatically the modification

How ? Thanks

I don’t really follow you seeing as Scapple doesn’t have pages, but if you mean that you’ve copied text from B to A, then no, there is no way for it to automatically update, as it is just a copy of that text, the same as copying and pasting text between word processors.
All the best,
Keith

excuse me my question is not about scapple but about scrivener. Thanks