Acrobat Review and Commenting - Tip & Trick
Here is a question I get alot. How come the comments on a documents scroll when you scroll the document? It usually comes as a complaint versus a question. It is okay, I have thick skin. The good news is it is actually just a preference. Go to Edit-Preferences-Commenting. It is the first selection under Preferences. Uncheck the “Ensure that pop-ups are visible as the document is scrolled”.
Here is a screen shot that shows the preference.

I would also recommend spending some time in Preferences. You can definitely find some hidden gems.
Last but not least, I know that there has been some time between posts. I will become more active in the coming weeks.
Have fun,
Jonathan