Hot keys:

Control+space:  open/close the input method.
Shift+space:    switch between full/half width letter mode.
Control+comma:  switch between full/half width punctuation mode.
Control+slash:  switch between Simplified/Traditional Chinese mode.
Alt+Shift:      switch between English/Chinese mode.
Ctrl-D:         disable a phrase (Use up/down arrow keys to select it first).
Esc:            reset the input method.
