That's called "Justified". In Word 2007, you can achieve this for any given
paragraph by clicking the Justify tool in the Home ribbon tab. In earlier
versions of Word, the Justify tool is in the Formatting toolbar. In all
versions of Word, you can press Ctrl+J to toggle justification on/off.
Applying attributes in this way is called "direct formatting". You will have
better control and formatting leverage, however, if you create a style that
contains the justified setting.
