Thanks Charles. Yes, I like that the cross-reference takes you to the original note, because I want that original note to be the single source of truth for all places that refer to it, and then for it to update numerically if I add a new endnote before it.

How do you tell Word to display bookmarks? That sounds really useful! Thanks for the tip.

I am using the inbuilt Word endnote function to add scientific references at the end of a document, with in-text numbers that correspond. When I cross reference, it is because I don't want to re-add the details of the same article again in the list of scientific references, so instead I use the cross-reference function to refer to an endnote. In the dialogue I select Reference type: "Endnote" and Insert reference to: "Endnote number (formatted). I do this every time, so I'm not cross referencing from one in-text numeral to another: each time I'm cross referencing the endnote number.

I hope that makes sense!