To switch to Greek input mode from English input mode, press Compose g g. If you are currently in Cyrillic input mode, first return to English input mode and then switch to Greek mode.
The input mode is displayed at the left bottom corner of your GUI application .
After you switch to Greek input mode, you cannot enter English text. To switch back to English input mode, type Control-Space. The Greek keyboard layouts appear in Figures 4-2 and 4-3.