How to: Prevent the last line from appearing alone at the top of the next page.
Solution:
Select the 'Widow/Orphan Control' option on the Text Flow tab.
1) Select the 'Format' menu and select 'Paragraph...'. (The Paragraph dialog box appears.)
2) Click 'Text Flow' tab.
3) Select the 'Widow/Orphan Control' check box in the 'Pagination' section.
Paragraph dialog box
4) Click 'OK'.