NX View Triad is Missing from the Graphics Screen

On the lower left or lower right hand corner of the NX graphics screen there is supposed to be a View Triad. This display was accidentally turned off. How can this be turned back on? A picture of the Triad is displayed below.

The Triad display can be turned on by going to the following location 'File -> Preferences -> Visualization -> View -> Decorations -> View Axis -> Show View Triad(Checked On)'.