Wow, 
thank you, Flatlander!  That was it, sure enough!  (Not that I doubted you, but it was news to me.)  I've never had a clue what any of the buttons on my keyboard do, other than the letters and the numbers (oh, and the four arrow keys).  I did finally learn Print Screen (sometimes I can get it to work), and that with Control I can highlight more than one thing at a time.  Um--since Caps Lock will give you caps only, then...Num. lock will give you numbers only?  It never occurred to me what the arrows on the numbers might be for. I have no idea of how to use the Insert function--but at least I've learned when I need to undo it, the darned sneaky thing!
Helen--I did pick up right away that when you hit the Back arrow, that page comes up a whole lot faster.  That's caching, then?  Caching is, um, storing?  [still groping in the dark e]  Also, I did the right-click thing--my menu has nothing about scrolling.  Max--I want you to come here and give me lessons!  May I cache in on your knowledge?  
