Then in the "Options" window
click on the "Save" tab.
In the "Default
format" section
select "Rich Text Format *.rtf " from
the drop down menu.
Press the "OK" button.
Note: After making this
change Word will now select "Rich Text Format" by
default when a file is saved using "Save As".To
learn more about rich text format see [Rich Text Knowledgebase].