Thank you both.

I have a need to print only the pages that contain revisions into a PDF file. So far I tried three approaches with none very satisfactory.

The first approach is copy and paste all pages containing revisions into a new document and save as PDF. The advantage is that all the "revision" footnotes and endnotes can all be pasted into the new document no matter if the footnote spans pages or the endnote don't appear on the same page as its reference number. The bad thing is that all the footnotes/endnotes would automatically renumbered.

The second approach is to use a PDF printer, which could keep all the original numbers of both footnotes/endnotes, but cannot deal with cases a footnote spans more than one pages and endnotes don't appear on the same pages as their reference numbers. I can set the body text to exact line spacing to get the footnotes as much as within the same page, but cannot find any way to determine the actual page numbers the endnotes would appear.

The third approach is similar to what Macropod suggests - all the non-revision pages (including non-revision body text and non-revision footnotes/endnotes) are excluded as hidden text. So far so good until Save as PDF no longer works! The text is hidden in Word as desired, but simply it wont proceed to save as PDF. I'm not sure is it's a problem with Acrobat or Word. I tried my code with Office 2013, and it's fine, but not with Office 2010. I googled a lot, but has nothing.

Appreciate if anyone can shed any light.