The keyboard is really good. 
Attention: The backspace is called ‘roubout’ and you can use it with SHIFT! on the right side on top (same place like backspace)
There are three modes:
  • Default Inser-Line (L)
  • Commands (K) - Commands : Shift-Function > The command
  • Graphics (G) - Create the char with graphics (First Shift Graphics > Shift Key)
The whole system is a token coding thing.