There's some feature turned on on which causes my typing line to jump back
and forth between pages. I might be two-thirds down the page and the cursor
moves the line to the beginning of the next page so there's considerable
space between the line on the above page and the top of the next one. Then
typing where it jumped to it moves the line back to the previous page. I
can't seem to find what the problem is. Any help appreciated. Tks.