"track changes"

[Christopher Ryan]

The editors of the journal to which I am submitting a manuscript want
the revised version with the changes visible in the compiled PDF file,
a la M$ Word.  This is the first I've encountered this sort of
request. I have my LaTeX source file under version control with git,
but that doesn't seem to be what they want.

I found this package on CTAN

https://ctan.mirrors.hoobly.com/macros/latex/contrib/changes/changes.english.pdf

but have no experience with it.

Any advice?

Thanks.

--Chris Ryan