I have inserted bookmarks and hyperlinked them to text in my document so that
a narrative will come up in ScreenTip when the mouse is passed over certain
words in the document.  However, in some of the ScreenTips, the narrative
appears to be too long.  Is there any way to lengthen the amount of
characters allowed in a ScreenTip?

I notice that when I am looking at a blacklined document (Compare/Track
Changes), there are lengthy "screentip" kinda pop-ups that hold much more
characters.  Any idea what I can do??