To change existing text to bold, italic or underline, highlight the text and click the B, I or U buttons on the Word toolbar. To type in new text with a different format, switch to the new style by clicking B, I or U. To switch back to normal, click B, I or U when you are finished typing.
Turn On and Off
The bold, italic and underline buttons (and keyboard commands) turn on the attribute as well as turn it off.
Press Ctrl-B, Ctrl-I or Ctrl-U for bold, italic and underline.