Graeme,
I understand your frustration at working everything out as a new car can be daunting at times especially nowadays with all the techie stuff. However, as others have said, the best way is just sitting in the car with the owners manual open at the interior diagram page and identify every knob, button and switch until their function is second nature to you.
If the Puma is set up like the Focus then you will have 3 drive modes – Normal, Eco and Sport, which in the Focus can be changed by pressing a button on the centre console. The Focus also reverts to Normal mode when the engine is switched off no matter if Eco or Sport had been chosen before.
I’ll come back to this thread tomorrow and see if there is anything else I can help you with.