>press ALT on your keyboard.
Aha! that made the difference. Thank you!
>point exactly between 2 columns
I've always done that.
>until you cursor changes
The cursor changes a little to the left of that point, and it always drags the whole column.
However, encouraged by your post, I moved about 1/8 inch to the right of exactly between the columns, and the cursor changed again. This time I did succeed in changing the width, about 60% of the time. Not ideal, but with enough patience, I can eventually get the adjustments made. Thanks. (Why did they make it so hard)