In the file you attached, the "comments" are really endnotes (like
footnotes, but collected at the end of the document). Notice that each
one has a superscript number, which is the connection between the
location you see and the text of the endnote.
You insert a new one by placing the cursor at the end of the table
cell (or anywhere else in the document), clicking Insert > Reference >
Footnote, and choosing the Endnote option button. When you click OK,
the cursor jumps to the end of the document, where you can type the
text of the endnote. To return to the table, double-click the
superscript number at the beginning of the endnote text.
To hide the fact that the endnote text is really at the end of the
document, you can modify the Endnote Text style to make the font color
white. The text that appears when you hover over the column heading
will still be black on yellow. To be able to see the endnote text
while you're typing it, apply a dark-colored highlight to it.
--
Regards,
Jay Freedman
Microsoft Word MVP
Email cannot be acknowledged; please post all follow-ups to the
newsgroup so all may benefit.