A complete guess...

Try Window|Unfreeze panes.

I'm betting that you scrolled down, showed different (all??) data from the
autofilter.

And I bet the freeze panes was applied in the wrong position.

MartonMan wrote:

In just one page of my workbook, when I scroll beyond the bottom of the
visible page, the page doesn't scroll up, the cursor goes out of sight. In
effect I can't move from the top left hand corner.

What has happened, and how do I fix it?

--

Dave Peterson