Forum:How can we activate the DISPLAYTITLE magic word?

How can we activate the magic word? I've tried to use it on my sandbox but it does nothing....

Is there a similar magic word to change the sub-title? --Heavymachinegun 14:40, 26 April 2008 (UTC)
 * It is activated, it just cannot arbitrarily change the title. The title you change it to has to normalize to the correct title of the page (so I could do to change the F in Forum to lowercase in the title, but I cannot do  because it doesn't normalize to the correct title). --Skizzerz talk 22:27, 26 April 2008 (UTC)