We’ve covered a lot of Ctrl+D shortcuts previously (fill down in Excel, duplicate slide in PowerPoint, bookmark in IE and Firefox), so it’s understandable if you get a little confused about what Ctrl+D does in each application.
But, if you spend a lot of time in Microsoft Word, you might want to memorize this one and practice it today: Ctrl+D brings up the Font dialog box in Word, where you can change the font face, the font size, the font color, and a few other special formatting options. (Don’t forget you can press Ctrl+Tab to change the tabs in the dialog box to change character spacing and special effects.)
If you have selected text, pressing Ctrl+D will apply the font changes to whatever’s selected. Otherwise, if nothing’s selected, it’ll affect what you type next.