Not justifying last line of paragraph

When fully justifying the text in my paragraph (in Word), how do I prevent
the last line of just a few words from being strung out across the whole line
(i.e. too much spacing between words)?

I am using Office 2007, and still trying to get used to it.

I saw a previous posting with "Enabling the Compatability Option 'Don't
expand character spaces on the line ending Shift-Return'", but can't work out
where to find this, or if it will help me.
--
Thank you, Chrissie
.

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