I'm sure it's very elementary, but I'm finding for whatever reason that if I make a mistake in typing,deleting the wrong letter,on the left of the cursor, using backspace and inserting the right letter causes the next character on the right also to delete - meaning that I have to enter the whole sentence (and sometimes an entire paragraph) again. Every left delete causes the next right letter also to delete! Probably I've pressed a wrong key somewhere which activates this (useless??) process - - but which one? How do I get my keyboard to "work" normally? Incidentally, I am sooo grateful for this "Helproom Forum" and the benefit of all you guys and gals out there with your computer omnicience! Thanks!