To enter Korean characters, type Control-spacebar to turn on Hangul input conversion. Alternatively, if you have a Hangul keyboard, you can press the Hangul/English key to turn on Hangul input conversion.
The status region shows Hangul as the conversion mode. The area also shows the active keyboard layout.
You can also use Contol-spacebar or the Hangul/English key to toggle off Hangul input conversion.
When Hangul input conversion is on, an auxiliary window appears with a palette of icons that you can use to make mode and keyboard selections.