Normally when I drag the vertical scrollbar down to the bottom position
it goes to about line number 150 or so, depending on how much data I
have in that worksheet. But on one worksheet it suddenly and
mysteriously changed to scrolling down to line number 1048576. I don't
know what I did to make it do that. How can I get it back to normal? I
don't like it the way it is because the scrollbar handle is very small
and in normal use stays at the top of the range, making it harder to use
it to scroll up or down within the range of lines where I have data.