How do you turn off the text under an icon in the ribbon toolbar?

Solution
Go to Preferences -->User Interface --> Layout --> Toggle on Slim Ribbon Style.

It becomes this:

Notes and References
Hardware/Software Configuration
Platform: INTL64
OS: window
OS Version: 764SP1
Product: NX
Application: SYSENG
Version: V11.0.2
Function: UI_TOOLS
Ref: 001-9225745