You may or may not consider this simple, but I've been using Word for a
long time, starting before a lot of the current features were implemented,
and I have a habit of cross-referencing using old-fashioned features.
In each caption, I use a field for the number, using
Insert > Field > Seq
Then I bookmark just the field.
For the references, I use
Insert > Field > Ref
And refer to the bookmark name.
The fields can be copied and pasted, and they can be edited once you right-
click "Toggle Field Codes."
Hmm. I'll have to read up on fields and bookmarks. Thanks.
Fred