This controller, due to its strange, yet easy to use look, as 3 ways of
holding it:

The Home Mode:
Holding the controller by the 2 outer prongs with your left thumb on the
D-pad, your left index finger on the L button, your right thumb on
buttons A and B and your right index finger on R.

The Main Mode:
Holding the controller by the middle and right prongs with your left
thumb on the analogue stick, your left index finger on the Z button,
your right thumb on buttons A and B and your right index finger on R.

The Left Mode:
Hold the controller by left and middle prongs with your left thumb on
the D-pad, left index finger on L, right thumb on analogue stick and
right index finger on Z